Your CPU and RAM are absolutely fine. The video card is apparently quite new, and will likely do well. The main question is whether your video card has 2GB of VRAM or 4GB. If it's only 2GB, you will likely need to lower your texture settings to avoid stuttering (namely on bigger maps). Check my guide for details.
The other thing is that while it's easy to start off over 60fps in this game, the longer the match goes on, the more performance dies for no apparent reason (particularly on heavily deformed maps, I think). It seems to be an issue with the game code, because my system resources always have performance room to spare when this happens.
Yeah... Relic's optimization is renown.. Thanks for the detailed information tho.