Yeah the Zotac only has one fan which was putting me off.
I think my favourite of the GTX 560 Ti's is the Gigabyte OC. I know the SOC clocks a little higher, however i can OC that myself.
My budget started at £700 and after weighing up the pro's an con's of each component im now up to £800 :P and thats without an OS still although im hoping one of my student friends can get one cheap
so keeping the graphics card good, while being mindful of cost is pretty important. The OC Gigabyte fits the bill at £200. Hopefully sometime next year ill have some spare cash to SLI it.
And yes the Ti is a much quicker card than the standard GTX560. On some benchmark tests i saw, the SOC Gigabyte running at 950MHz was out performing some GTX570's and there still room to OC up to about 1025MHz.