Check that this enlarger does 6x6. Have a look at the link below.
Seems high, but like fotch i do not know Denmark,
You are getting all you need in one purchase though.
If the durst is not up to 6x6 easily perhaps a meopta opemus/axomat - there is another thread here today on the 80mm lens, which i think may be better than the 75mm nikon for 6x6. Regards