Jerry, I have been looking at these two (ME2012 and the MS2012) for about a month now and really it comes down to do I absolutely need a pure sine wave (MS2012) so my TV and kids chargers for there toys can have power while it's quite hours. The modified sine wave will do the same but for about $500 - $600 less. Again I think it comes down to what are you planning to run off the inverter?
phinneyj, As for setting the control panel I would recommend YouTube there seems to be a wealth of info on getting familiar with the control panel.
P.S The wife said we will go with the MS2012 so that in a year from now she won't have to listen to me complain I should have gotten the one that will run some future device that requires it.