>>2562835As far as flatbeds go, the Perfection series is about as good as you can get without dealing with obnoxious interfaces. Things like a Reflecta will be better, but they'll be a lot more cumbersome, and much more expensive.
For 35mm, get a Plustek 8100. If you need to do medium format as well, the V series is the way to go, though you should be prepared to lose most of your fine detail.