If you have the moolah to spend, Exoto certainly won't dissapoint. A couple of friends bought some of their stuff and the level of detailing is just superb. Most of these have working suspension and tyres that even deform slightly with vehicle weight :-
Check out the picture gallery on some of the examples :-
http://www.exoto.com/s/1/ProductOverview.aspx?Language=en&CategoryId=357
http://www.exoto.com/s/1/ProductOverview.aspx?Language=en&CategoryId=149
http://www.exoto.com/s/1/ProductDetails.aspx?Language=en&CategoryId=208&ProductId=1204
Check out the picture gallery on some of the examples :-
http://www.exoto.com/s/1/ProductOverview.aspx?Language=en&CategoryId=357
http://www.exoto.com/s/1/ProductOverview.aspx?Language=en&CategoryId=149
http://www.exoto.com/s/1/ProductDetails.aspx?Language=en&CategoryId=208&ProductId=1204