Help in choosing a card

Well since my GTX560 died and went to meet her maker ive got choosing to do. I know what ill get an replacement(2 weeks or less i hope) due to overheating problem (fans didnt work with enough power to cool down the card), but ill be selling it to my nephew soo with some cash that ill add the budget will be about 250-300$. Basicly i dont search for offers beacuse i live in the old country (Europe/Poland), but looking for advice. Right now im looking on GTX 570 and 580 beacuse im planning on "learning them how to swim in summer" (watercooling). The power supply for the info is Seasonic X-series 660W soo power plus brand should be enough.

better off buying a gtx680 than wasting money on watercooling dated gpus.

Also do u have a loop planned?

Watercooling is a stage 3 soo its all just in basic plan to go with water. After the GPU ill be cheating on AMD and go with Intel since friend will be upgrading his rig soo ill get 2500k cheap. 680 is twice the price here than used 580. If i wanna get a monster ill rob a bank and get 690 :P

$300 will buy you an MSI twinfrozr 660ti Power edition.

Well no if you live in 3rd world country where goverment cares only for themself. 660ti prices start at 400$. I had it in my mind, but get that much outta my budget is a no-no.

Anything 6oo series with this kind of cooler