Actually, the C280 is faster than the CLK. But the CLK is brand new so maybe it's just not worn in yet.
As for the Porsche, I don't drive that one much! I have never really cared for Porsches. I know that they are truly great vehicles, but they just aren't to my liking I guess.
And as for SUVs... I don't care for them either. I used to drive the Tahoe before I got the C280, and it'd night and day. I can't even describe the difference. We also have a 1992 Jeep Grand Cherokee, and that's a REAL POS. It's been an OK car... not TOO many problems (3rd trans at 135k miles though!). But the car squeeks and rattles over every bump, every turn, and it's enough to drive you crazy.
I just want a little more oomph in the C280 because it's the car I drive all the time!
