I realize that you specified manual focus, but I suggest taking a close look at the Nikon F100. For these reasons:
-- It has an eye relief viewfinder. If you're shooting with glasses on, I strongly suggest getting a camera with eye relief. It allows you to see everything in the viewfinder, even when wearing glasses. The F3HP has eye relief as well, but I prefer the viewfinder readout of the F100.
-- It has a large, bright viewfinder.
-- Although it is autofocus, you can easily use it in manual focus mode. It aids manual focusing by means of a rangefinder, which provides a green dot to indicate when you've achieved focus. I use this camera with manual nikon lenses all the time; it works great, and I don't miss focus.
-- The F100 is very well built and reliable.
-- It's not as bulky and heavy as the F4 or F5. I can't see using the massive F5 unless you need 5 frames/second.
-- F100's are plentiful and can be had at very low prices now. You can easily find them for around $200.
Dale