Welcome to the club - you will love the 370.
My recommendation is to get a later 370 with the connect premium, its the advanced sat nav system. Earlier 09 plates had the older system.
Latest GT edition has a quieter interior and more comfortable suspension but will be at the higher end of the price range.
40th Edition Black has a lovely red interior and darker alloys.
Either way buy it and enjoy but doooooooo change that stock exhaust, it makes no noise what so ever
Any questions fire away, my advice is to look around and wait for the perfect car. Prices have come down a lot and its a buyers market, especially with some garages slashing lots off the price of these cars ready for the newer GT editions / 2013 spec car.