The headphones are Sennheiser HD500s, which, from the research I did, looked to be the best headphones I could get without getting astronomically expensive. They are certainly the best headphones I've ever used, but they make me realize that I really need to get a decent sound card for my main computer. Plugged into my Klipsch ProMedia 2.1 speakers they sound terrific. They are an open design so they won't be the best choice if you want isolation from the person next to you. The HD500s also score well on comfort; they put almost no pressure on your head and I've worn them for hours with no discomfort.
The new mouse is a Logitech MX1000 cordless mouse. I initially wanted this mouse as a more egonomic upgrade to the Logitech OEM optical mouse I was using before, but I soon found that this mouse was leagues ahead in every way. This mouse has a high resolution laser sensor instead of the LED sensor on most optical mice. This makes the mouse much more smooth and acurate especially on surfaces that a standard optical mouse just can't handle (polished surfaces, glass, paper, etc.). So, not only is this mouse way more comfortable that my old one, but it's much better too. Going cordless was an added bounus. A rechargable non-replacable Lithium-Ion battery powers the mouse and can go about a week between charges. Three battery level LEDs let you know when to put the mouse on its charging base station. I have yet to get the multitude of buttons working as a newer version of X.org is needed.