An Evo is a totally different animal to a Skyline, and as a performance car probobly a better proposition for the most part.
4 doors gives you practicality, and sure you can get a 4 door skyline but for the most part they dont really have much rear space.
For tight twisty stuff, no GTR will touch an Evo - they are just so chuckable, and when you think they are out of grip they just dig deep and give you more.
Sure they dont have a big motor so arnt really a top end monster with the standard turbo etc, but thats not what the car is about.
They also seem to be more reliable for the most part then most other japanses turbo cars - dont spin big ends like dak dak subarus and dont drop oil pumps and all the rest of it with GTR's. But they arnt perfect, and clutch changes are hell for whoever does them. Being a Mitsi, avoid ones from snowy areas in Japan as they will be the ones to get rust cancer first. Typical roof rust issues, which seems to have existed from day 1.
I've been lucky enough to drive 6 TME, 7 JDM, 7 GTA (auto - interesting!), 8 Aus, 8 JDM and 8 MR. Id rather a 7 then a 6, just feels like a more competent car, but the 6.5 sure feels pretty raw, and thus fun.
Interestingly, the first Jap 8 I drove happened to be Nigels after he sold it