Hi Vic
I can't help you with a body, as I'm still using the one I've got, but I wanted to ask you how you liked working with the motorized body?
Is it just the bulk issue when carrying it?
Do you use it hand-held or usually mount it on a tripod?
I have a 553 ELX I got for a good price because it needed repairs, but it turned out the repairs are more than I was led to believe. (I bought it hoping for the best as I work a lot with my 120 and 250 lenses and the cutoff of the top is sometimes very annoying and the newer mirror of the 553 was going to "fix" that issue...)