I am currently selling my lovely is200SE and am going to replace it with a bigger car. I was originally going to buy a

BMW 5 series estate. Better fuel consumption than a Lexus and can carry a lot of crap.
BUT...while looking through autotrader i started twitching when i saw the twin turbo V300's

My question is what are the performance figures like? and what are the running costs like? (fuel, parts etc)
Does Lexus GB service these cars? Can you only buy them as an import model?
Any suggestions (including ***** taking ones abouth the BMW) are all welcome!
Regards,
Matt