ok, jokes aside. ive used an ipac and a keywiz. the ipac costs a bit more but is programmable and has some useful default key combos using a shift function (for exit, etc) and it also has a keyboard pass- through. there is also the jpac which is much the same but plugs straight into a jamma harness. the keywiz i bought because it is very small and had a cheap and cheerful option of just soldering wires straight to the pcb (rather than screw thingos like on the ipac). the small size and the soldering part is important for my next project (a clue for bones). also its really cheap! no key board pass through though. since my next project is somewhat limited in what it will do the keywiz is fine.
they both seem to be well put together.