GTX 560ti 2Gb v 1Gb?

[SEE]

Seems I didn't read the ad correctly....damn! .

I placed an order for a 2GB 560 but it is not the ti version. The latter is about £30 more but not sure wether to cancel it, pay the extra or go with it since a lot of the reviews say that a standard 560 oc'd performs reasonably well. I only ever envisage running at max res of 1920 x 1080 (when the game is fixed!) and sticking with my current 24in 1080i monitor.

Ah well, will think about it over the weekend but any comments would sure be useful to help me decide......