What is a good all around high quality speaker to purchase?

Depends on what type of music you like.  If you like acoustic and classical, I don’t know if there is anything better than electrostatic speakers.  Sound Lab is my favorite in the category, that I’m aware of.  However, you will want subwoofers with the electrostats, as bass is lacking in them.  If you like modern techno music, perhaps looks for a different category.

You should be kidding when comparing Thiel speakers with Bose and Polk Audio speakers or having a wrong amplifier. Thiel 3.7s have outstanding mid and high frequencies, low frequencies are a bit weak.  If you want deeper base, look for CS 6s or CS7s.   

onehorsepony

I too think you're being too hard on the Thiels, especially the 3.7. It's picky, needs proper equipment pairing, and the listening area is not generous......but when you get it right, they're glorious......but I understand, they can be hard to live with. I've owned 5 sets of Thiels, and the only ones I have left are the 2.3s; which I do not find dry at all.

Thiels can be very finicky to get set up correctly. I have a friend that has owned a pair for about 20 years. They have never sounded good. Now, this is definitely partly a criticism of my friend. He has a powerful Krell amp and a good front end... but is in a difficult room(s). Also, he was unable to correctly do anything on the acoustics. But, you could get a cheap set of Polks and have them sound better. So, while the fault lies with my  friend and the home he chose for them... some fault lies in how sensitive they are to their environment. Got a great audio room and you are dedicated to making them sound great... and they can. If in doubt, I would look elsewhere.