I would have recommended the PS3 until you specified you liked wrpg's so much as the 360 has much more to offer in that genre.
This is just my opinion, but in my head:
PS3 = Best for adventure games
360 = Best for WRPGs
The 360 has a great line up of console exclusive WRPGs such as; Mass Effect 1, Risen, Two worlds 1, Fable 1-3 and to be frank the Bethesda games just run better on the 360, particularly Skyrim.
The PS3 should easily come tops for adventure on the strenth of the Uncharted/Rachet and Clank/Infamous series alone IMO, But the countless HD collections should not be overlooked either.
Personally, I'm going to fall into the annoying 'both' camp :P But if you intend to upgrade your PC in the next couple of years that might be a reason to sway towards the PS3 as the PC is the true king of WRPG.