Hello and Welcome to Windows7forums..
You should be fine to run Windows 7 on your system my friend.. The best way to know is to try..
Yes it should run smoothly with your setup.. I've got it running on 4 different pc's and one has lower specs than yours and it runs alot smoother than I expected.. That's the shear beauty of Windows 7..
I'd recommend you backup all your personal files prior to installing just in case.. And perhaps the best way to do it in your case would be to create a new partition (if you have the space that is) and install the RC on there just in case it doesn't work as smooth as you want it to.. That way you still have your main OS to fall back on..