I have used generic mousepads (like $5-10) for most of my PC history. My current one is getting rather ratty, so i'm looking for a new one. I don't have much room for a mousepad on my keyboard tray, so a small one would be preferable. Do non-generic mousepads have a noticeable difference, and if so any good recommendations? I do have arthritis and tendinitis, so that might factor in to the mousepad selection, but should not be limited to that parameter. I do have a keyboard wrist rest. Thank You.