The "High" and "Low" is what was giving me the impression that the Nanaos are Medium Res. I'm beginning to believe that Sega put only dual switchables in that cabinet. Hence i've seen alot of conversions done with that cab.
The weight of the cab is some what the monitor but mostly the build. I could climb inside it with the monitor in and shut myself in with room to spare. You really could use it like a closet.
As far restoring it, on ebay depending on the day and the buyer expect anywherebetween 3-500 for a good looking and working machine. In a retail shop expect a bit more.
I thought of putting different games in mine at times just to switch things up a bit. I.E. Dead or Alive 2, Virtua Fighter 2, and etc... All Med. Res games.
Final thoughts: If it's in good condition and you have most of the pieces for the cab (Marquee, Bezel, Good artwork on CP, Good artwork on sides) check into picking up some game boards. The game boards alone are a piece of work. Sega and GE Aerospace worked together to make a 3d simulator, so they developed the hardware that is in the Virtua Fighter. Basically the building blocks for all 3d fighting games to come. The hardware was expensive to make so there are only 4 games on that particular platform. (VF, Virtua Racing, and a couple others).
So no the game isn't a classic (yet), but for someone who isn't an old timer it was a very big step in games to me. I am proud to own the machine and I plan on playing it while technology advances and arcade games are beamed directly into your head via satellite.

Here's a good site for Model 1 information.
http://www.system16.com/sega/hrdw_model1.html