Nah I get what you are saying and I understand that smaller lighter cars could run rings around a heavier, more powerful one but we don't necessarily need to be in the fastest car around the track. We just want something fun, something to learn in, and something that wouldn't be frustrating to drive.
I can see that I would need to learn these skills but would it be much harder to learn in a slightly faster car? I only ask because I am swaying more and more to a RWD BMW purely for the reason that I would like to master the driving technique I have honed in my everyday car...
And when you say M3/325 have high running costs, what do you regard as high? And will they be much higher than the average? We are not looking at competative racing or anything, just a couple guys running a car on weekends to have some fun in.
I think it's a good idea going for a RWD car given you've got your 325 already.
With regards to the high running costs of the M3, the problems I found was that even insurance to get the thing to the track days will be phenomenal, then you have more expensive brake consumables, you'll get through tyres quicker, and although rare, engine work will cost you a fortune.
You need to go in with the mindset of it being a hobby, not a competitive sport, otherwise when it comes to fixing things you might get put off it altogether. It is however down to how much you can justify spending on your hobbies, and although it will be expensive, there are enough e36 M3s out there being broken to just about get away with most things on the cheap.
I have personally gone for an e36 318iS. If my engine blows I can get a replacement one for under £200. If my gearbox goes, I can get a replacement for under £50. Even a new clutch kit is only £100!
I only gave a budget of 2-4k for the car because we didn't want to splurge too much on something that might not be worth it, as if the inevitable happens then it would be a waste... but I'm willing to increase the budget if it would be more sensible.
For reference, I started a thread VERY similar to yours three years ago. From that thread I did a few track days in my main car before going onto buy my track car. I have done about 10 track days in it now and don't regret it one bit.
Yeah true, maybe I should reconsider. You see, the thing is I'm not sure exaclty what to consider as we are both new to this sort of thing. Maybe I should take my 325 on a track day and see how it/I cope and then judge from there?
Definitely, definitely do this first. Try not to part with any cash until you've done at least 2-3 track days in it. You will have a much better idea of what you want from your track car.
But your point about running a lighter car with a decent set-up surely has to be compared to a more powerful car with a similarly decent set-up rather than just a more powerful car?
On a track day last weekend I kept up with an e36 M3 (280bhp) in my e36 318is (140bhp). The M3 was totally stock, but had tired suspension and he kept cooking the brakes. My 318iS has stock power, but coilover suspension and various other suspension refreshes. My point being that a well set up light car with little power can be not far off the pace of much more powerful stuff. A 318iS can be had for under a grand, an M3 can be had for around 3-4.
I guess my point is that power isn't everything, and remember that it is just a hobby. Shelling out hundreds of pounds needlessly on expensive repairs will put you off very quickly.