I like EVGA as a brand, and blower coolers.
Here is the EVGA GTX960 4gb:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487133
That said, it may not pay you to spend extra for 4gb unless you are into skyrim mods which I think may be poorly optimized.
Otherwise, there is not much performance difference between 2gb and 4gb:
https://www.pugetsystems.com/labs/articles/Video-Card-Performance-2GB-vs-4GB-Memory-154/