Given your size, I'd suggest going with the Explorer. I am about 5' 10" 175lbs and my expedition feels just a little bit cramped. I still use it since I have a decent amount of mod's (money) put into it, but wish I had gotten the explorer for that extra room to stretch out.

I do like that my bugnet is always with me on my HH. Seems like there are always bugs out in the evenings when/where I camp... and when there aren't bugs out, the net holds a little bit of heat in to help keep me warm.