Aw, that's a shame.
Hmmm, does your family have a blu ray player yet?
If not, the PS3 would have a lot of added value for you. My mom uses it all the time to watch movies, blu ray or otherwise.
TBH, once you get absorbed into a game, you will forget about graphics and button layout.
Even with the horrendous jaggies in GTA IV, I still enjoyed it as much as any other pc game.
Did you have any particular games you want to play though? I'd look at those instead of just console vs console.