Get a durst M605 COLOR(dichroic head). In europe they're pretty plentiful it seems(they sure are here in the states), and with the color head, it makes dialing in variable contrast grades as easy as 1,2,3 !
Get a 50mm 2.8 EL-Nikkor lens, and go to town
EDIT: one more thing: At least here in the USA, if you buy a used enlarger, I'd highly recommend replacing the lamp(bulb) before using it. That way you have a fresh, brand new bulb. Buy a spare or two, just in case. They're not too expensive IIRC. Better than being in the middle of a printing session and your bulb blows out or starts to flicker...