When I graduated from 35mm the man who sold me my 6cm x 7cm Mamiya RZ gave me advice that has proved good. He said most who use MF eventually try 4x5. In today's market there is little difference in price between a good MF and a good 4x5 enlarger. I have an LPL 4550XLG/VCCE that works very well. I have since moved up to 8x10 and I can also highly recommend a Durst. I also use the variable contrast light to make contact prints from the 7x17 pictured in my avatar. In life like chess it pays to plan beyond your next move.