I've driven a 300M - the FWD 'predecessor' (only the 3.5 V6 is shared), and by god, that thing could handle, especially for a big FWD beast. I also used to drive a W124, the car that I think really donated a lot of the underpinnings to the LX platform (Magnum/300-C/Charger), and it was relaxing, smooth and capable - and when pushed, it really handled very well, if the actual body control was poor. Mercedes and Chrysler aren't silly about chassis engineering.
What people expect of a car here is a bit different, but I drove the MG ZT260, and it was harsh at low speeds. Too harsh. Worse than the RX8. I don't want harsh, the roads around here are like a bloody warzone and the 2CV is worrying enough on them.
I want my V8 unstressed and lazy, keeping me going at relaxed, pretty legal speeds, unless I want to pass something right now. If I had 30K and wanted a sports car, I would buy an MX5 or Elise or VX220.
Richard