Which 7970 should I get?

Hey guys, you wanna leave some links to the different 7970s you think I should buy and the reasons why? Was looking at a few but any input is appriciated. It has to be quiet!

For air overclocking, the Asus DCII (Direct CU II) 7970 3GB is fantastic.

For amazingness, the Sapphire Vapor X 6GB 7970 is just jaw-dropping, but expensive.

Sapphire Vapor X 3GB is great; pretty good cooling. Great prices, too.

Gigabyte Windforce 7970 3GB; great cooling, somewhat limited OCing.

MSI 7970 3GB Lighting - fantastic card; one of my favorites, but still, pricey.

 

Stay away from XFX; terrible cooling. Just awful.

 

TL;DR Get a Sapphire for possible watercooling, but for definite air, Asus or Msi Lightning. For insane resolutions, Sapphire 6GB; 3GB is fine, though.

Damn it, has anybody heard of any other board partners coming out with 6GB versions other than just Sapphire? I want that Direct CU II but I also want to future proof my VRAM and get 6GBs instead of 3.