Any recommendation for a small field monitor for Canon 5D Mark II?

[nedyken]

I'm shooting with a Canon 5D Mark II.  I'm building a little shoulder brace rig so I can mount some stuff and have some stabilization.  I'm considering purchasing a small field monitor.  I had heard something about there being an issue with how the 5D Mark II displays video on a field monitor.  Something about the newer 5D Mark III having resolved this issue.   I don't totally understand what the issue is.  Does it have anything to do with a feature called "DSLR Scaling" that some field monitors seem to have?

Also, if you use a field monitor with Magic Lantern, will it show the same Magic Lantern-related visuals being displayed on the little LCD screen?... such as the focus peaking and histograms, etc? 

Would really appreciate some advice on which field monitor to go with that is best suited for the 5D MArk II and Magic Lantern.  Thanks in advance for any help!