i personally would love nothing more than to own an 05 sti, but that's because since i was like 12 i've always loved wrx's. Sounds to me like the evo would suit you though. You said you love the cars, and you like how they look over the sti. The evo's are probably "faster" if i had to make a black and white decision, and the only reason i see for you getting an sti would be if you want more reliability or the fact that its a few grand cheaper.
However keep in mind those are the two most practical factors in looking for a car.