Not sure how much lyngdorf is but TacT is $10K,Is you could swing $3K (less used) check out DEQX which is amazing.It not only corrects for room in digital domain but also can make most lowly speaker sound a like a competitor that costs ten times more.Made the little NHT Xd have everybody drop thier mouths open not believing small sub and 4.5" mid driver satellites sound huge and accurate.Will take equipment and room you have to deal with and optimize,again,not just room but feeds back the tonal characteristics of speakers drivers,cabinets,drivers work best they physically can.Also great for speaker builders as it means you can build a design and use x-over in DEQX.If your budget can handle it it will act like best set up of diffusers,reflectors,corner foam which breaks up standing waves.Doubt old lady would le that swing.See review at www.6moons.com and Stereophile and NHT Xd reviews in both of those mags (at least Stereophle).Afetr I have revamped my system and will add thjis to optimze system at a level and cost effectiveness found in no other device though I know $3K isn't cheap.But if you put it in you'd never take it out.
Chazz
Chazz