I'm 6'5", not as big as you--205 now, usually finish the summer below 200 :-)
The very best clothing options I've found have been from Eddie Bauer (First Ascent line). I have down jackets, fleece shirts, wind shirts, and baselayers from them. Large/Tall fits me well for everything but the baselayers, where I have to do XL/Tall and they're still a bit short.
For long torso packs, check out ULA Equipment. Their Catalyst and Circuit both accommodate up to 24" torsos. I have the Catalyst in Large and love it (though I'd probably get XL if I bought again, just to get a little more use out of the load lifters).
My tent is a Tarptent Rainbow, which has plenty of length even with a 2.5-in air mattress and 15-degree down bag. EDIT: I meant to mention that I use a standard-length (72") air mattress. I put my sit pad--a rump-sized piece of blue Wally World CCF--under my feet to keep them off the cold ground. I'm a side sleeper, though, so my feet rarely go over the end.
Shoes are the hardest. I've done best through the years with Vasque, but every year they seem to have fewer models in size 15. :-(