The GeForce GTX 660 Ti is an excellent graphics card, and you get lots of bang for your buck. Out of the six cards we tested, the ASUS DirectCU II Top made the best impression. It has the highest clock frequencies and is very quiet. If the price will indeed be about £20-£30 higher than the standard ASUS GTX 660 Ti, then it's not as interesting anymore, however.
That is why the MSI N660Ti Power Edition is the card we would recommend. It's also very quiet, performs very well, is affordable, and appears to have the best overclocking potential. Both ASUS and MSI earned the Hardware.Info Silver Award.
MSI N660Ti Power Edition 2GD5/OC
ASUS GTX660 TI-DC2T-2GD5