Long story short, I've tried both tubes and SS on the Nautilus 805's but the metal tweeter always gets to me after long periods of listening. They do great on vocals/jazz but for faster/bass heavier music, they really leave something to be desired.

I'm looking for something with smoother highs, something that doesn't use a metal tweeter. Fuller bass would be nice too, I found the bass a bit lacking on the 805's, although it wasn't too bad in my 11x15 room.

Whether it's a tower or monitor makes no difference to me, but I do NOT want to add a subwoofer. My budget is about <$2000 on the used market (Audiogon) and my amp is a McIntosh 7100 (100wpc SS).

Here is some good used speakers that I see so far:

Totem Forests - $1800
ProAc Response 1.5 - $1100
Usher X-719 - $750
Harbeth Hlp3-Es2 - $1300

Like I mentioned, I'm looking for something that is non-fatiguing/smooth while retaining the openness/airy sound of the 805's. I've demo'ed a few speakers so far from B&M shops and while most sound smoother, many have a boxy/recessed sound.

Any advice is appreciated, thanks!