I switched from play RB on my PS3 to my Xbox just to get full and immediate access to RBN content. That was early last year--what's happened since then?
How many PS3 RBN songs are there? (For the Xbox, there are 809 as of today's additions). Can you download songs for free on a demo basis and play a little of the charts before buying? (When I switched, there weren't even audio preview clips).