I bought a 2013 Evo X GSR last year. I'm 35 BTW..
The handling of the car is flat amazing. It is actually scary because the limits are so high. We had a bit of snow and just running some Kumho Ecsta 4X all seasons I have been able to get around great. It is the first time I have really enjoyed driving in the snow. The brakes are amazing as well. I took a coworker for a ride and almost made him car sick from the handling / braking (was like a 3 minute joy ride). Don't go for a drive after eating Mexican food, lol.
The car is "raw" which I like in a sports car. It makes all kinds of mechanical noises that you can hear (turbo, exhaust, downshifts, etc..). The hood and roof are aluminum to keep weight down and there is very little sound deadening. The GSR has a ridiculously tight 1-4 (4th gear is fine at 35-40mph) gear ratio, and even in fifth you are still doing over 3K rpm on the freeway.
I also like that I basically never see another Evo on the road where I live. I see a STI just about daily.
Active Yaw Control is a good reason to get a Evo over a STI. It really works. It is easier to make more power in a Evo. You may not be able to buy a 2015 Evo, so get one now while you can 🙂
Now downsides...
The transmission tends to make little "chirps" when going into gear, almost like you are grinding it. When it is cold it is a bear to shift (physically difficult to get into the shifter gates). The car likes to be warmed up and driven hard. 20mpg (premium only) on a good day.
The creature comforts are greatly lacking. Your SO is not going to be impressed. I actually picked up a second car for road trips, a Hyundai Elantra. Here is a list of things that the much cheaper Elantra has that the EVO is missing.
Heated Leather Seats, Navigation with voice commands, Backup Camera, Panoramic Sunroof, Excellent phone/ipod integration, power seats, auto-dimming mirror, etc..
Also it is quieter on the freeways and will knock out 30+ mpg on regular. I understand that you can get more of these features with a Evo MR.