Alright, final update. I basically tried everything under the sun to troubleshoot this issue myself and after a lot of help from everyone here and RMAing about half my build. I finally just took my PC in to my local computer shop and was prepared to pay them to diagnose it. They got to work on it, but because of how random the crashes are, they were having difficulty replicating the problem, the machine does just fine through high intensity stress tests, but can experience a graphics driver crash during a process as simple as me typing in this browser text field with nothing else open right now. They worked on it yesterday and today and were stumped until one of them did a bunch of research to see if he could find anyone with similar issues on the web. Based on what he told me, this is a known issue for some owners of the card that I have and it's basically an issue that just is--I'm not alone in experiencing this issue. For a lot of other owners of the GTX 460 2Win, they're having issues with the same thing and it seems to be due to Nvidia not really giving too much of a crap about their users and fixing driver issues.
It's supposed to have been fixed, Nvidia has claimed that they've gotten it taken care if, but the fact of the matter--based on what the tech at my local PC repair store said he'd seen online--is that they clearly haven't fixed the issue across the board. So I guess my next step is to call Nvidia and give them a piece of my mind about it, but chances are that I'll likely have to deal with it until [hopefully] Nvidia actually puts some effort into working on the problem once and for all. I know it's just an inconvenience in the scope of things, but it's one of those things that you'd think they'd be more on top of, it does prevent a user from getting the fullest experience out of their card. So anyway, thanks for all of the assistance you all provided me with, I'm going to go ahead and mark this as solved, hopefully Nvidia will eventually release a driver that will finally fix this issue. Cheers!