your performance should be fine. Most problems with wow frame rates are limited to cities which is more of a server problem than a local machine problem. There will be plenty of people stating that you should have bought intel, but you'll be fine.
Since you have a large closed loop on the list, you will be able to overclock to compensate. Honestly, its not really that necessary. My soon to be ex wife uses the same cpu without problems on an old radeon 5770.
Only things I would change is the PSU and video card. For close to the same money (about $40-50 more) you can pick up a Radeon 290 which will give you far better performance for much longer period in games other than wow. Since you will be using a 60hz monitor it wont be about frame rates, it will be more about how many settings you can turn on. For PSUs, refer to the recommended list
Another common recommendation is to use a large air cooler instead as they are a little cheaper and often quieter. It really depends on what you want out of the build. With the closed loop you can say its water cooled and there's not a huge fan/heatsink hanging off your board. With the air cooler, you dont ever have to worry about the pump failing.
Im not sure if you have read up on the 840 evo, its a good drive, but it has a firmware problem which causes it to slow down after a month. Theres an update from Samsung for it though. Honestly though, theres other drives out there for cheaper that are just as good. The MX100 and SanDisk Ultra II are my recommendations. If your just going to have the SSD, then I recommend a 240-256gb drive. WoW does a terrible job of cleaning up after itself and will quickly take up 30+ gb last I check (about a year ago). This will also let you grab a couple other games in the future without having to add another drive.
Edit: PCPartPicker part listEdited by PhillyB - 11/18/14 at 6:47am