[onewhippedpuppy]

I've had two 951s, they are remarkable driving cars that still hold up well today. But you'd be hard pressed for me to buy another because they ALWAYS need attention and SUCK to work on. While yes, they are just a 4-cylinder, the engine, turbo, and all of the controls are absolutely jam packed into a small engine bay. Everything is vacuum controlled, meaning there is a mile of vacuum hoses and tees that are subject to cracking, consuming hours of your time to sort out a random issue. Basically every single task requires removal of the airbox and plumbing, and a good percentage more require the removal of the intake. The clutch replacement is a nightmare, torque tube bearings are a nightmare, you can't even see the turbo from above, etc etc etc. It's a great car but so tightly packaged that I eventually just didn't like mine.

So I guess of the three, I'd probably pick the E24. I've never had one but always thought they were absolutely classic looking cars, one of the best bodystyles of the 1980s. Though I would go after an M6, which are still pretty affordable considering how special they are. Also one of the last BMWs that was really built to a standard rather than a cost point, post E30/E34/E24 they really lost their way and in my opinion have never found it again.