I own a SLK32 and a C230, and have driven several SRT-6's. As someone mentioned above, if you have a family get the C230. I have a 7 month old, and I rarely get to drive my SLK anymore. In fact, I'm thinking about selling it.

There are several issues with both cars, however, my wife has put 70k miles on the C and we've really only had to do routine maintenance. She's thinking about selling it and getting a SUV for more room.

If you're young and single, it really is a no brainer: Get the SRT or even a SLK.