Hi,
 
I am about to upgade my GPU to 2 in SLI so am looking to upgrade my fans for a better thermal environment.  I have a CPU watercooling kit which has a radiator that takes two 120mm fans.  I have been looking at the - has anyone used these?
 
For me case I want to replace my two stock 200mm fans - does anyone have any recommendations?

Hey smckechnie, first off welcome to the EVGA forums.  
 
To answer your question, a lot of people are going to have there own opinion on which fans are better for your situation.  I am here to offer my opinion.  I have several different fans I like to use.  To be honest, I don't see to much difference between the ones I use most often.  I have used the SP120 and they do well, they tend to be a little loud at times but that is not a big deal to me.  I have also used the Sycthe Gentle Typhoons and they were a good fan to use with radiators.  Nice and quite and keep things cool.  Lastly, I am currently using the Cougar Vortex PWM fans and love them.  They keep my CPU at really good temps and stay nice and quite as well.  So with that being said, in my humble opinion, those would be the fans I would recommend.  There are other good ones as well but these are the fans I have been using.
 
http://www.newegg.com/Product/Product.aspx?gclid=COKvsuPbv70CFYdFMgodaXAAxw&Item=N82E16835553006&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Case+Fans-_-N82E16835553006&ef_id=Um5gbQAAANaaSUJg:20140401163403:s
 
http://www.frozencpu.com/products/10323/fan-674/Scythe_Gentle_Typhoon_120mm_x_25mm_Fan_-_1850_RPM_D1225C12B5AP-15_Hot_Item_.html
 
http://www.newegg.com/Product/Product.aspx?gclid=CIf-qrncv70CFc9AMgodi2gAMw&Item=N82E16835181039&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Case+Fans-_-N82E16835181039&ef_id=Um5gbQAAANaaSUJg:20140401163704:s