Put a lift on, need some tires and wheels!

[EZJKTM]

Hey guys, first time poster here with a few questions! I did a search for all this stuff but couldn't find a whole lot.

So I have a 94 K1500 GMC that I just put a 6" procomp lift on. I wasn't planning on lifting the truck because I already have an offroad truck, but happened upon the lift at the junkyard for $275 so I couldn't pass it up!!

Right now I have 265s on the stock wheels. They are real nice BFG AT's that were brand new this summer, oh well! Now for my questions...16" tires are way more pricey than 15's, so can I fit a 15" wheel on there or do I have to stay with 16's? Also, do you guys think I should go with 35s or 33's? Half of my buddies think 33's and the other half thinks 35's haha. I was thinking 35's but I don't want to mess with regearing on this truck so I was thinking performance-wise the 33's would be better.

Anyhow, thanks in advance and I'll post some pics tonight after I get the rear done