Ok, I completely blame Magnum for this. I've just played 6 hours straight of build 175.

It's going to take a plastic surgeon to get this grin off my face - it's really fun so far. The graphics are awesome (great performance), the tracks are nice (well, I only know Monza well enough to obsess with that, so I guess I mean 'track'), the feel of the car is good and the AI is, um, 'boisterous'. A lot of those clowns race like I would with a few beers inside me, so races are never uneventful. The early lotus's are a riot, and going at full tilt around curva grande makes me both cackle and sweat.
Wow.