Sylvester you made a decision yet?
Ok its not my choice but seems to fit the bill of everything you're looking for: my mate has been checking out a Mazda 6 MPS. 2.3 turbo, 0-60 6.6 secs which isn't slow in anyones book. Fully kitted out, 18" wheels, the only option you pay for is sat nav (hey, its even got memory elec seats as standard!), from a dealer with 4 miles on it (yes 4 miles) - a shade under £20k.
Don't know what it drives like, he hasn't been out in it yet, may be worth a look though?????