We upgraded from a nice 98" xj8 to an 04 XJR last january and I like the X350 XJR much better, the air ride suspension makes it firm but never ruff and the cabin feels much more to my liking. Buy that I mean larger and better ergonomics and not miniature like the dash and front interiors are in the xj308. The engine has also been perfected, and the thrust this thing makes is like a 60's big block only faster.