Plasma tweeters? Very cool! No, I don't think the LRS will displace them.
Interestingly though, you're in the target range of the LRS program -- according to Wendell Diller, they want people with $30,000 speaker systems to try the LRS, even if they just do it out of curiosity and expect to send it back, because they have enough of the big Maggie sound so that some of them will like what they hear enough to get the larger Maggies.
Of course, you're already familiar with planars, so for you I imagine it will be more of an interesting what can they do for $650 experiment. I was fairly amazed myself, it was some of the best sound at AXPONA (many of the systems were crippled by show conditions, of course). As I recall, Steve G. says they play in the $2000 range, and having heard them at the show, I think he's right.
The Apogees did go deeper than Maggies of similar size, but according to Wendell, the early Apogees had a midbass suckout because they tuned the diaphragms for deep bass rather than midbass smoothness --- there's only so much bass energy available for acoustical equalization. So Magnepan went for smooth bass rather than extension.
The Apogees also typically had better midrange because of the ribbon mids, but the quasi-ribbon Maggies are closer and the new high quality midrange in the 30.7 is as good as any mid I've ever heard. But the true ribbon Maggies had better highs because the Maggie ribbon tweeter was narrower and lower mass.
I think the LRS is an ideal second system speaker for the serious audiophile, or first speaker for a non-audiophile or someone on a budget. It's surprising that a speaker that's limited to 50 Hz sounds like it's putting out so much bass, but of course it doesn't have the solidity of a planar or dynamic that goes down to 20 or 25 Hz. Some guys are wondering if they wouldn't make good surrounds, too.
Another limitation of the LRS is that it won't work in big rooms without a sub, there isn't enough diaphragm area to couple to a big room.
A week sounds like a good minimum -- they will need burn in, though I understand less than the old wire voice coil Maggies. Looking forward to your impressions!
