If going to 64bit means a new motherboard then it's not worth it. I guess what I'm saying is I just want to moderately beef up my current computer to breathe a little extra life in it. I'm not concerned with long term on this computer. But still, if you don't think I'll notice a difference then it's not worth it. Now on a dedicated editing rig I'd be more concerned with long term.

Now to learn how to overclock...

Thanks, svhs!