Now this is a very interesting topic and of course it needs a lot of debate. But first i have to point out that
the final decision is yours. You have to listen to your mind and heart above us all! But i'm sure you know it, so i'll get straight into topic.
The first question is whether you should change the C55 with a more track-oriented car or keep and and get another one: I think that if this car will be your daily drive, stick to a car that is comfortable enough, with quality materials and that suits your everyday needs. So we come up against your very first question, replacing the C55 with the new M3 or getting an EVO.
EVO: Boyracer's car? I don't think so. The driver makes the car, so... Anyway, the EVO will be much more hardcore. This car is made for hard driving and track use, which means that it is what you need when going to a track, but it is not what you need in your everyday life. It's less comfortable than a C55/M3, far more worse quality materials, minimal design. Though, since it's a Mitsubishi and it will not used much in your everyday routine, i don't think that the maintainence costs will be that high.
M3. This car is a league of its own. The point is that with the same money you have two choises.
Stick to one or two cars, which ends up being the most important question! The point is, you will spend from 50 to 60k. So with that money, you can get the above car with its pros and cons, or replace your current one.
This way, you can either have one excellent car for everyday life and cruising and one for track use. On the other hand you can have both in one. This is buy getting a M3, which has a great image as the C55, but also will cost a lot more and won't be the total king of the track, like the EVO, since it's an all-arounder.
To sum up with, you either have to choose on getting a car only for track use, or replacing your current one with one, which is also an all-arounder but more sporty. Both for almost the same money.
Now, if i were you, i would get the EVO. Reasons.
1. Why have one car when you can have two for almost the same money.
2. You have many needs (family car and track car) which can NOT be fulfiled with only one car. No car is perfect and no car has above futures successfully combined.
3. The C55 is almost new, but if you try to sell it you loose much money from it's starting price. So it does make sence keeping it for another three or more years.
4. You can lease an EVO for two years, without having to spend 50k to buy it. This way fun will cost less.
5. Great or no great, the EVOs are meant for track use, and not for everyday life. Also you will get far worse quality than in your C, and this is a major issue.
Going from an AMG to a Mitshubish is a huge step back!
Hope i helpes. I will think more on this the next days, and i'll see what i'll come up with. Good luck.
