What’s your cpu like?
What generation, clockspeed…
Um, just to double check.
You’re looking at a gtx 260 (800 something ram) and a gtx 250 with 1gb ram?
The 260 is cheaper?
The 260 is a better card than the 250, without a doubt.
While the 250 in question has (slightly) more ram, it wouldn’t be of any use.
If you’re playing at a high enough resolution to actually utilize the extra ram on the 250, the game you’re playing will be graphically intensive enough to yield better results with the faster gtx 260.
The 260 simply has a faster core with more stream procs. The memory is faster too, if I’m not mistaken.
Now, depending on the age of your cpu, it might bottleneck the performance of the 260, so I can’t yet fully recommend a card.
I would certainly recommend the 260 over the 250, especially if it’s cheaper.
Hope that helps,