In my opinion, you should just ditch the 2600XT altogether. It honestly makes more sense to put that money toward something like a 4850—it’s a much better value than trying to squeeze any extra life out of another 2600XT. You aren't going to see double the performance by doubling up, so...
Let’s be honest here—a warranty isn't going to do you much good once your drive actually dies and takes all your data down with it... Every single disk is a ticking time bomb, really. It doesn't matter which manufacturer you go with; you can always run into that one stroke of bad luck where, out of everyone else, yours is the one that suddenly gives up the ghost and drags terabytes of precious files into the void. If you’re looking for actual peace of mind, just do the backup. Burn some DVDs, keep an extra external drive tucked away, or stick some stuff on a cloud server... honestly, it just depends on how paranoid you want to be. 🙂
Exactly—it basically gives you the freedom to swap your DPI settings on the fly. So, if you're right in the middle of a match, you can just toggle to a different sensitivity profile you've already saved. It’s worth taking a quick look at the little manual, though; it breaks everything down pretty clearly.
There aren't any hard and fast rules here. It really comes down to preference—some people prefer making big, sweeping movements and want a mouse that lets their hand relax, like the Razer DeathAdder, while others prefer tighter, more precise micro-adjustments and opt for something smaller, like the Diamondback 3G. Both mice are top-tier; it’s strictly a matter of which one feels more ergonomic for your specific grip during those long gaming sessions. Personally, I’ve been using the Razer Lachesis and I couldn't be happier with it, though I know plenty of folks find it a bit too small for their liking. Honestly, the smartest move is to just head to a local Best Buy or drop by a buddy's place to get both in your hands—once you actually feel them, the choice becomes obvious. 🙂
I know the FBI actually has a rapid prototyping machine—which is really just a fancy way of saying they have a 3D printer—but you’d probably have to give them a serious call first just to see if they’d even consider printing something for you.