Bought the Logitech G602 today, Best Buy had it on sale for $60 down from $80. I haven't used it for very long, but so far I'm really impressed with the responsiveness:
Feels nice in the hand, smooth glide, and the bottom row of buttons are easy to "rock" with your thumb. I probably won't ever use the top row for much of anything, to be honest. The only thing I'd change about the design is maybe adding a small lip on the left hand side for a pinky rest, to match the thumb rest on the right. I like that you can flick the middle switch from "performance" to "endurance" mode to extend battery life whenever you're just browsing or doing daily work (it drops the polling rate to 125 from the performance mode's 500). It also works with just one AA if you prefer a lighter mouse (it's by no means heavy, though). I also like that it's not littered with flashing or pulsing lights, just the normal indicators for dpi switching and switching modes. It uses a dedicated nano receiver, not the unifying ones Logitech normally puts in the box. We'll see how it holds up over time. This is the most I've ever spent on a mouse
Got the G105 keyboard the other day:
It's not mechanical, but it has the larger mechanical-type keys with a deeper throw, which is what I was shooting for. I can handle chiclet keys on a tablet keyboard, but I don't care for them at the desktop, and my last keyboard had tiny keys. It's backlit, which is nice, and has 6 programmable keys on the side with game profiles in the software. Also has a button that disables the windows and menu keys while you're playing. Pretty basic gaming keyboard, but I mainly got it for typing, and I like the feel of the larger keys. Most standard keyboards nowadays have tiny keys and feel mushy. I'm eventually going to get a mechanical keyboard, but I don't want to spend more than $100 so I need to do some research.