If your gonna pick out the 2, get a 6 im not saying it cause Ive got one, but it's not called Evolution for the fun of it.
Had mine 4 years, im 2nd owner and I imported due to the tatty Uk cars I kept coming across, never bored of it just a shame I dont get a chance to drive it often,
6 has better Ecu, bigger intercooler, oil cooler, better pistons better aero also. Brembo also are revised also

Things to watch out for AYC pump and solenoid these trigger the light when on there way out, though they are easily repaired and can be reconditioned

Rust in the rear chassis legs, boot floor and inner front wings, where the spoiler meets the boot flexes so tend to start cracking at the join.
Diff bolts do go, but easily sorted
These cars do not like shit tyres on them
only run on super

There is more to learn about these cars but I could be here all day, feel free to Pm

The rear Arms had recalls and Lambda sensors, so check with Mitsubishi these has been sorted affects all cars.
I went through 3 clutches due to the power level I was at so went for a Alcon from a Fq400, which has lasted very well, but grabby in traffic situations.

There not cheap to run, lovely cars and plenty of fun, 400bhp+ & beyond not alot will stay with you.

There diiferent varients of the 6, GSR, RS, RS sprint, RSX, zero fighter, TME, well worth looking at which model may suit your needs.