My questions would be the same as Gary's. I find that even though I try to compose on the ground glass there are times that I see the image in a different way once I am printing. So cropping although limited does occur at times.

Along the lines of an enlarger, you might check with Michael Mutmansky. He converted a Durst 138 (5X7 enlarger) to an 8X10 enlarger. This can be easily accomplished by opening the upper bellows plate opening and building a neg carrier (the AN glass can be obtained from Focal Point). Michael's enlarger incorporates an Aristo 10X10 cold light head. However, I believe that it is possible to build a cold light head from F15T8 tubes (I checked the peliminary measurements to determine this). My cost to build such a head was slightly above $400. The enlarger can be located for less then 1,000. The enlarger will fit under 8 ft ceilings. Just a thought...