As far as Keyboards are concerned I would stick with any of the good old Cherry stuff, cheap, nice touch and structural stability. If you like to pay a little more I heard the Logitech Wireless Keyboard works nice, especially if u use Winamp a lot, because it has those handy play control buttons. Being wireless also makes it very easy to set up at a place other than your desk.
The optical mice come in handy when u a) dont have a hard surface to use it one, for example your bed (I like to surf
will lying in bed...)and b) when u have to clean them, because u dont....
Wireless mice are nice gadgets for sure, but as for all wireless things they rely on batteries and they do run out of juice. And without the JUICE there is no fun in life...
btw: u can get the smooth mouse movement with ps2 mice too, use ps2rate!