Late in the day to be answering the OP's question, but I'm gonna do it anyway.
Since you have EOS lenses, you'll want an EOS body. The best cheap one is the Elan IIe, I got a few for $25 each. The best newer body is the Elan 7N, which has the backlit top deck LCD that the Elan 7 doesn't. The best inexpensive pro body would be the EOS 1N.
Outside of Canon? I like Contax, but they're expensive. You might also consider a Mamiya 645 Pro; they're so cheap I bought two.
Beyond that? They're all good. Well, except for the original Maxxum 7000. What a dog.