I shot 4x5 for several years, then stopped when I bought a Nikon D80 then D300. I pulled it out a few months ago and was blown away by how much more detail I get from 4x5 than I do Nikon DSLR. One thing I'll bring up is that to be really happy, you need a scanner. I just bought a used Epson V700 for $290 from eBay. I'm buying the wet mount holders from BetterScanning.com in a week or two. I'm using the stock Epson holders until then. Doing your own scanning is the way to go, I think. If you photo in a studio it won't matter so much what camera you get. If you photo outdoors much, a field camera is the thing to get. I'm once again shooting 4x5, so far only b&w.
Kent in SD
I am still blown away by how much more detail I get from 35mm film than from a digital camera. Anything above 35mm, digital does not even begin to approach. I guess I must be really easy to please!
"Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."