Cheap until it breaks!
Exactly the reason I won't buy an E60 M5 as a daily. Strangely enough I ended up looking an Mazda 6 MPS's on the net last night, dirt cheap, 2.3 4wd turbo, well specced and highly tuneable for £6k, thats my sorta car, great and doesn't matter if it shits itself.
I thought about these myself before getting the Lexus. Only reason I didn't was because I didn't wanna spend more than £3k, and wanted something a little more sensible (as in quiet, built well, etc) - but the MPS is a lot of car for the money!
Also, RS4's - 2006/7 saloon (B8 platform), 420bhp Quattro : R8 in a 4 door saloon! Less than £20k now
Under £15k -
http://www.autotrader.co.uk/classifi...1500?logcode=p
Under £19k -
http://www.autotrader.co.uk/classifi...87dg?logcode=p