It's probably already too late, but don't worry about it, the Thermaltake should be fine.
Yah, it's too late to change the order. I'd have to return it and order the other one, which I guess wouldn't be that big of a deal...I just wanted to make sure i did a good job on my first build. You guys probaly get tired of dealing with newbies like me going what should i get what should i get?