Hi I'm looking for a bigger memory card for my psp. I see that i can get 8gb sandisk cards in buy.com for $55. my question is sandisk cards good with the psp? I remember reading a few years back that we should only use the sony cards. Is this still true?

Also whats a good price to pay for a 8gig card now. I remember paying $120 for my 2gb sony card 2 years ago. I dont want to make that mistake again.