@erik_squires
It depends on the sound you want from them. If they're too bright all them models have pots to dial them back, and if that's not enough, just put a wash rag behind them. It'll soak up more sound.
I did a good bit of work to mine. The first gen models were roughly finished and the only ones with 10" alnico drivers. I sanded the top halves down and sprayed them with a few coats of black semigloss that exactly matches the AMT housing. I also went completely through the crossovers. Out went the cheap Mexican caps and in went a pile of nice Solen PP caps. That really changed the game with those.
Placement is a little tough, but once you get them sorted out, I think they bring the best of electrostats to the game with none of the silliness that comes with gigantic radiating surfaces. I use spiked plinths with mine and those make a significant difference in terms of stiffening up the weak mid-range. I like them.