Althought I agree with the guys about the 4x5 stuff look into the linhof stuff. Their technical camera's are beautiful and practical plus there seems to be a surplus right now especially on "you know where". That said I almost gave up my LF gear(I have a linhof tech III among others) until I began looking at the tonaliy of my prints. Frankly I've never been able to achieve the same qualities with MF even from my rolleiflex. So above and beyond the movements I would rate tonality as my first criteria.
You may find that all the effects from the movements may be a bit over rated unless doing serrious architecture or studio product work.
For me my 4x5 monorail is the best I've used for still in studio:the flexibility of the long bellows makes macro and other close focus work a breeze the movements I don't use much.