Bernie: yeah, I feel it too! I have been waiting to get excited again over new led! the K2 just didn't deliver that excitement, and frankly, it didn't impress me from the datasheet when it was announced either!
Don: that tri-setup is impressive, is it correct that I'm seeing one smooth even hotspot? The quad setup is even more interesting, due to extra lumens, and probably a tighter spot with a smaller head than using 4 indivudual traditional reflectors. A copper center section with the leds soldered to it would take care of the heat pretty well I would imagine. Wattage at 700ma would be around 10watts, which is not bad at all considering my tri-luxeon setup runs at 11watts and puts out probably less than half the flux.
The quad setup seems to make the most sense to me for such a radical/extreme torch over a tri-setup. The extra heat should be able to be managed, and the extra light in the package is worth it when you are talking at least over an extra 100+ lumens at 700ma is added. The extra cost for one extra led shouldn't make that much of a difference in the grand scheme of it. I figure if the space is there for 4, might as well do 4. A dimming setup or high/low would be icing on the cake. For massive lumen LED torch, this would be about the best you could have in a nice managable size.
And yeah, it looks a heck of a lot cleaner than having 4 seperate reflectors!