IMHO, the only Magnaplanar models worth getting, are the ones that use RIBBON tweeters. Those that have seperate aluminum grid wires on the same planar panel for the tweeter, will a) invariably have tweeter failure sooner or later, due to the aluminum wire corroding and cracking apart and b) not have nearly as good high end extension and definition as the ones with the discrete ribbon tweeter. I'll bet that 75% of all people who have older Magnaplanars with tweeter grids on the panel- they don't realize it, but the tweeters probably aren't working anymore... seen that SO many times.
So, given that, I'd pass on all of the "1xx" models. Probably most of the 2's too...
Regards,
Gordon.