I'd say go for a W140 (although I'm a bit biased ). A nice '98 or '99 S500 would fit the bill nicely and be a whole lot cheaper.

__________________
"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles