M3 no comparison to me. But if you want to save a little money or get a newer car for the same money check out a 5-speed IS300. I know its not on your list but it is well worth at least test driving.

Toyomoto has a turbo kit for it and there either is/will be soon a supercharger for it. That could be a great daily driver and weekend strip car. That is what Im looking to get in about 1 1/2 to 2 years.