I'm with jbass and Mtek. This is my daily driver, with occasional fun at the track. I'm doing about 8-10 track days a year now, and the car's been a real fun experience so far.
But it's not perfect, and I've had limp mode problems as jbass and mtek knows...still the overall experience is positive and I'm very happy w/ my 335's experience at the track. I'm still new and haven't experienced the flattening of the learning curve that The Hack mentioned. Realistically, I believe this car will carry me through these first few years. When I become more advanced like you guys, I'll ask for suggestions on what a good replacement track car would be. But so far so good!
But as jbass said, reliability mods are at the top of my list now