TV logic 5.6
This is an amazing little monitor: incredibly light weight, battery powered and really high res at a full 1080 HD.
MO VFM 056 Monitor case for TV Logic
5.6 inches is a little on the small side for a director monitor, but for many situations it works out really well. I bought this portabrace bag and use my 5.6 monitor as a director monitor when shooting in confined spaces. It has even been down a London sewer, and still kept the monitor in good condition.
Small HD AC 7
I have used Small HD monitors many times and really like them. I ended up buying a TV Logic monitor myself as at that time I couldn't find a UK distributor, that said if you are based in the US, I would definitely look at Small HD. Not only are the monitors good, but there is a very useful range of accssories that go with them.
Zacuto Z Finder
Ideal for situations that require a small light weight camera rig.
More monitor and EVF comparisons here