I'd just assume have Magnepan speakers, even for HT duty. Especially if you crave the bipole effect of the DefTechs. I'd look at the 1.6/QRs for the fronts and perhaps their center and surround speakers if your want 5.1. you could push the fronts with a Krell KAV-300i and it would be plenty dynamic and capable of SPLs that would literally drive you from the room (like 110+dB SPL). But then, planars are my bias. So take that with a grain of salt. I started with Eosone RFS-600's which were dipoles. It depends on what you want. But unless the maggies aren't dynamic enough for you I think they be strong contenders for about $1.6K/pair.
Perhaps more importantly is what prompted you to post this thread in the place? What do you curently like about your deftechs? What you your like to change? These answers may be key. But I still stand my my maggie recommendation.
Perhaps more importantly is what prompted you to post this thread in the place? What do you curently like about your deftechs? What you your like to change? These answers may be key. But I still stand my my maggie recommendation.