I have one of them soft cases too, but have have a little hard case kept with it for games and cards. I'd probably wait for the bigger card in future too.
Shame about Moto GP, thought that'd be good. Was thinking of the RC Motorstorm game. Looks great, and I have the PSP Arctic one downloaded which is an immense, immense game.
Motorstorm on the other hand is pure awesome. It cost me like £3 two weeks ago in the Summer sale and it's easily amongst the best games I've played on the system. I also got the Arctic one on sale and like it but again, I don't have enough space to fit it now.