I have the Gigabyte GTX560Ti OC - they only came with 1GB when I bought mine (just after release) but I would have gone for a 2GB if one was avaiable.
I would say always go for the max available as far as VRAM is concerned, even if you don't need it now - you never know what stuff is just around the corner and will need it.
I'm mega-impressed with the card. Been using the Red Ones for a few years now, but this green job really does the bizz in every sim I own.
Never been above 50°C either (it comes with a custom twin fan cooler).
Cost me £180 from Overclockers.
FH
_________________________
He who cannot laugh at himself, has no right to laugh at others
Exonerate: to show or state that someone is not guilty of something