-The new IX has a better interior than the previous gen VIII Evo's and takes to tuning a lot better than the Sti for LESS money.
-MIVEC is not like VTEC or anything else, it's intake side variable only, but takes to tuning a lot better than NON-MIVEC VIII's.
-The Sti is ugly, but the tranny holds up better to launches and you won't get it voided because of abuse like you would in an EVO.
-The Sti is a knife, the EVO a scalpel.
-They make the SAME power when dynoed, about 250awhp, so power wise, they're virtually the same.
-It's a question of handling and interior.
-FYI, the recaro's in the EVO are FAR more comfortable than the STI seats, your back will hurt in them, Sti's are notorious for that.
-Go with that looks better to you, because in terms of performance, they're virtually matched, the EVO is just easier to drive faster.
-Goonz-a twin turbo G35 or 350Z will still be slower than an EVO or STi stock, SPEED did a comparo and the numbers don't look too hot at all for the turbo charged 350's. . .
-the MSP6 is A LOT more expensive than any of those cars, and siginificantly slower. . .the Sti is uglier this year though, so my nod goes for the Evo. . .