Both eclipse keyboards have volume controls and mute. One (the only) "bad" thing about the eclipse 1 is that the backlight always turns on when windows boots up. It's no bother to turn it off though.
Good ol' mx518 for me too, the 800dpi setting is what I usually use anyway. Being a fan of cloth I'm using a Steelpad Qck which hardly slips on my dusty table.