I agree that the V11R has "a lot going for it" and it is my favorite AA flashlight. (Despite all the other cells options, to me, an Eneloop with the extender seems to be the most "practical" and economical way to power it.) It is also fairly expensive, but it is very nicely made, and the variable output is extremely elegant.
However, I think you may wish to think a bit more about how you are going to carry, and how you are going to use your flashlight (or flashlights). Walking the dog, and crawling under the house are "planned" activities, so you might not need to carry around the flashlight that you use for those purposes, at all times. You might prefer to keep such a flashlight near your door, or some other similar location, so that it is "ready to go" when you need it. Such a flashlight need not necessarily be small, since it need not be on your person at all times.
But, you probably will want (need?) to carry some kind of flashlight at all times. You always need a light for those little tasks such as "seeing the dipstick" when checking the oil at night, that tend to pop up at unexpected, and unplanned times. For this reason, I carry (and would recommend) a good (not necessarily expensive) keychain light. Many use high output emitters and can be remarkably bright, yet still have extremely long runtimes when set to their lower brightness settings. (For me, the V11R is just a bit too bulky to carry around at all times. So, I carry a $13.00 TANK007 E09 with 3 brightness modes, on my keychain.)
While the V11R is quite bright, it is not as bright on an AA is it can be on a CR123A or RCR123/14500. And, even at its brightest, I am not certain that it would ever be quite enough flashlight to actually "temporarily blind a potential threat in the house." (Although, it would easily "identify" an intruder, of course.)
Selecting a flashlight (or flashlights) is a very personal matter, and everyone has their own preferences. But, if it were me, I would probably purchase a number of very low cost (yet reliable enough flashlights) for walking the dog, etc., and keep them in strategic locations around my home. Others might strongly disagree, but I like the Sipik SK68 or one of their clones (currently available for around $4.00 each, including free shipping) for such purposes. They are surprisingly bright little AA lights with "Zoom" that allows them to be adjusted from flood, to throw. I, and almost everyone else that has ever used one, have found them to be quite reliable, but they are not at all "fancy" and their "optics" are pretty rough (lots of halos and other optical artifacts). But, they make a great little flashlight to grab and slip into your pocket as you are going out the door. Given their extremely low price, you can also safely loan them to friends (or even strangers). And, if you ever misplace one or drop it down a hole, you haven't lost much.
Next, you will need a flashlight to carry at all times. Once again, this is a personal decision, and everyone thinks differently. But, I think the V11R is too large, so I go with an AAA keychain light. (And, once again, I don't need to spend too much money on one.) Almost any model that you select should be bright enough for common tasks, but they will have short runtimes on High, so you generally only want to use them that way for a few minutes at at time. But, if you are ever trapped in a situation where you will be without any light for a long period of time, you can always use the lower modes that are available to find your way through a forest or something. (If it is truly dark, the lowest of modes will still seem quite bright, and many of these little AAA lights can provide 40-50 hours of run time in low modes.)
Finally, we come to the flashlight that you want, that might be able to "temporarily blind a potential threat in the house." This is a flashlight that you would likely want to keep near your bed. Unfortunately, I do not think that the V11R is going to be the best flashlight for this purpose. I think I would recommend something fairly large that you could grope around for and easily find in the darkness. No need to spend a huge amount of money here, but, if it were me, this is probably where I would consider spending the amount "necessary." (So far, the other flashlights I have mentioned have been extremely low cost.)
Not really trying to steer you away from the V11R. As I said, it is my favorite. But, I am thinking that you have several different needs, and those different needs may be best served by different flashlights.
Any further advice/recommendations will require knowing whether or not your intend to learn how to safely use Li-Ion cells, such as 18650s. Such cells offer great advantages in energy density, but also require considerably more "attention" to use and recharge safely. AA cells (read: Eneloops) are simple and safe.