ouch....XPCs are around $200 new though!! Thats a total rip-off.....but, you can get them used pretty cheap.
My vote strongly goes to BFG A/Ts.....good for almost anything.....even better then some M/Ts on the market. Perhaps SCSL will chime in, he run them and wheels like a crazy mofo.
That being said, like RoverX mensioned, there is nothing better then your run of the mill M/T tread.....it eats up everything but ice better then any A/T.....and I agree, the BFG/Dunlop/Firestone, etc. etc. etc.....the standard sized (hehe....non-interco) 3-lug design is very comfortable on the road and pretty good wear too.
IMHO, it would be much better to go with a mud terrain if you spend that much time going off-roading.