Color head for durst m800?

I'd have a durst m800 and would like a color diffuser head, for multigrade printing, and for RA4 down the tracks.

Should I look for a head for this unit, or simply look for a complete colour enlarger?

another question - are all these various colour heads diffuser style with dichroic filters?

Sometimes you have to buy the whole thing. I had to buy a second L1840 to get the CLS2000 head.