No worries. For normal use, and if you aren't going to utilize the thunderbolt, the R3E is a better choice. Keep your eye out for a koolance or EK block for it on your local forums and try and grab one. I had to buy a whole R3E and EK-FB as the guy wouldn't separate, so I just removed the block, refitted the stock heatsink (which I also dislike) and sold it, ended up almost getting the block for free so it was worth the hassle.

Either that or go another board but the fact you want to water cool and are buying a board this late in the lifecycle will make it harder to find new blocks in stock. You have the X58-OC but they may not even make a block for it......that's why I suggested the used block new mobo solution.