Also a fan of the E60 5-series. The M5 is pure sex0r but a 545i is more economical. Surprising thing about the E60 545i is that an '04-'05 model can be picked up for under $15K these days. Yes, it's almost a 10 year old car, but they are solid and quick.
This car is probably not the most practical, but I love them. The L322 (3rd gen) Range Rover HSE.
And on a completely impractical note... the Aston Martin DB9: