I've got Ridge Racer 7 and it's fairly good. The SIXAXIS controls (ie sterr it by moving the controller) are a lot easier to use than on Motorstorm, which seems as if it was added as an afterthought. However, I found that after the first few levels it became a lot harder quickly, so it has a steep learning curve.
I'd recommend R:FOM, I especially like the co-op campaign on that. Motorstorm is also good, but it's a shame there's no split-screen. Don't forget that there's also PS2 games (which should have reduced loading times, and be upscaled, don't belive any of the FUD which seems to say that PS2 games aren't compatible, they are, I think BC is above 90% now), and you can also get games etc off PSN. Most of the big games have a demo you can download if you're not sure about the game, ie R:FOM, Motorstorm, Heavenly sword, Ghost Recon, and others.
One person's experience or opinion never shows the general consensus
PSN ID: Tispower
MSN: tispower1@hotmail.co.uk
