The c230 is an awesome car. It has the same solid benz feel as any other benz and is just great for the price. I assume you've test driven one already.
My c230 is great. Haven't had any problems whatsoever except for my passenger side vanity mirror that was shattered during delivery, but the dealer dispatched "mobile service" to my house and replaced it under warranty. I've only had it for about a month now, but everything seems fine.
It seems like a few people on this board did get some lemons (which every car maker on this planet will have and I've seen worse!), but from what I've heard most people haven't had any problems at all. Plus, most of the problems experienced are fairly minor and are completely covered by the warranty, which I beleive Mercedes has the best.
But like I've said before, a car is only great if you've driven it and it feels great to you. Get the one that you feel the most comfortable in and behind the wheel - that counts the most. Even if you have an overly expensive or high performance car but it feels like shit to you when you are behind the wheel means nothing, and certainly makes no sense in spending the $$$ for it.
Good luck and let us know what you decide on.