Hi Beatelbum ...I had the same experience with the Magnepans when I first listened at a dealer showroom. I thought they were lacking in detail. But theres a difference in true inner detail and detail.I was accustomed to listening to speakers that have 1 inch tweeters.There's a slight beamy effect that gives you a false sense of detail in some box speakers IMHO.The highs jump out at you and aren't quite as seamless as the lower freqs. That being said I would still consider a Planar or Electrostat speaker.Make sure they aren't powered by recievers and by something with more current if you audition them.
$4000.00 can buy you a great used pair of planars or electrostats.Like the Innersounds ,Magnepans,Martin Logans,Quads,and I'am sure there's some I missed.Most can only be enjoyed by one person but there's less interaction with the room..since you have a wall of sound beamed directly at you. I call it the headphone effect. I haven't heard a box speaker that competes with these mentioned in speed,inner detail,and the sense of the venue.Regardless of the price.
I don't know how some of these would fit in with the HT.But with that SVS sub taking care of the subterranean freqs while watching movies.I don't see it as a problem.