I had an evoIV and i have to say it was an awesome car, in nearly every way. It looks better than the 5 and way nicer than the 6 (my opinion)
I had heard about the crank issues, but never came across it (although the car was left largely unmollested - bonnet only came open to change the oil lol)
The drive, seating position, gearchanges were all sweet, perfectly placed, although the car did require 100% concentration while driving - steering was like a go kart, and it tracked the road like it had pritt-stick on the tyres
Launches are awesome (this only had around 300 pones) and the grip given when you floor it through a corner was immense. (all that fancy diff / yaw business)
Apparently the clutches are like fudge though, and cost a fortune to replace when they go.
Here she is / was in all her filthy glory