SL55/63/65/R230 AMG: Leaving AMG going to Porsche
If you really would like a sports car with a backseat, would not recommend the 911 for any passenger out of a car seat.....
The new M3 vert is too damn heavy...it'll seem really slow after a top if the line AMG. M6 vert suffers from the same issue...weighs 500lbs more than the M5 sedan.

If I were going vert I'd stick to the SL, though the 997 verts apparently handle well, though I'll admit to having not tried them firsthand...

-Rob
The Best of Mercedes & AMG









