Headset, keyboard, and mouse

MK520 is a pretty good mouse keyboard combo and one of the least expensive you'll probably find. I'm personally a fan of the K360 + M500, but that's a little more than you're probably willing to pay.

As for the headset, $10.00 more will get you a Siberia v2, which is one of the best on the market in my opinion. Very, very good headset.

Also extremely comfortable. Anyhow, just my 2-cents.