I know it wont help you much but I have kept the possibility of playing backups out of my mind when I decided which vgc to buy.
Its just a matter of time. Look, you have only a certain amount of time to play. At least to me its like I have to (and like to) spend some time with my family. Most of the time I have to work as well. Buying a PS3, even without the possibility to play backups was and still is in my humble opinion a good decision.
There are games like Splinter Cell Conviction which will never make it to the ps3. But you could use the pc.
And games like Uncharted 2 or Little Big Planet are just awesome titles which will take a decent amount of time to master (or to get all achievements). And Darksiders will be Xbox and PS3 which will be time consuming.
Looking at the possibility of game rental or downloading demos makes the PS3 even more time consuming.
What i like to say is ... I dont need so many games. I like to play them thoroughly. Doing so I save a lot of money. The times when I fiddled with vgc, emulators and backup systems are long gone. If you do like the technical aspects ok. But backups are not worth the time, money and hassle (call me a wise guy
I save money and time ... dont hunt for stuff you wont have the time to enjoy.
PS: I usually buy DVDs and record the audio at home (old school
). So I have the DVD and the audio track. Another way to save some money and to support the performing artist.
PPS: Sry for being slightly of topic