Trade in my RX-8 on SLK 350(?)

I love my RX-8 in terms of handling, not to mention the smooth, high-revving wankel engine. It's a joy to drive on winding roads. The part that drives me crazy is the road noise and seats. Between the two, fatigue sets in after an hour or so in saddle. I can't even enjoy the stereo system.
As I mentioned, the GLK has spoiled me (with no guilt feeling what-so-ever).
Anyone here ever drive an SLK 350? I've heard they're a bit small, but that's not a problem for me.
3.5L



