I've been running Thiel 2 2's (no decimal point...) for 25 years without the slightest urge to "upgrade." Whenever I hear other speakers that I think sound "really good," I come back to the Thiels and realize they they're as good or better.
That said, some things to note. As other have observed, the Thiels DO require a top quality high-current amp that can drive their low impedance. I drive them with a Classé CA-200 (Kimber cables). It's a match made in audio heaven. Also, my listening room is relatively small and very well damped. I use a now classic actively crossed over Mirage sub with them, and the result is a system that is essentially flat, and coherent, from 20Hz on up (Thiels by themselves roll off in the low 40's). Positioning is important, too. Away from walls, NOT toed in and in an equilateral triangle with the listening position. They're not too bright at all, but it's all there, and they're a joy to listen to.
So it depends. YMMV. In the wrong room with the wrong amp, there'll be no satisfaction. But, heck, @ $800? A screaming bargain. Spend your savings on a good amp.