I would guess that you prefer a very accurate, detailed and neutral sound. That's how I imagine your system must sound with the NuForce/Thiel combination. If you want to stay with this sound, then the First Sound Presence Deluxe II or Modwright 9.0SE are good choices.
If you want something that sounds a little rounder, and perhaps just a little softer in the highs, I'd suggest a Lamm LL2 Deluxe. The Joule and VAC would also move in this direction.
If you want something that sounds a little rounder, and perhaps just a little softer in the highs, I'd suggest a Lamm LL2 Deluxe. The Joule and VAC would also move in this direction.