If your looking for an integrated amp, I would look for a used Classe. They mate well with Thiels and can be had used for about $1000. The more power the better with Thiels.
Better amplification for Thiel CS 1.5
A friend of mine sold me some Thiel CS 1.5 speakers earlier this summer (quite an improvement over my Infinity Reference speakers), and has started me down the audiophile path. I am currently running them with a Kenwood VR-407 5.1 receiver (5 X 100 w/ch @ 8 ohms), but I know these speakers can produce a better sound. I don't have very much money. Any recomendations would be welcome (I'd like to get Krell, Classe, or Rotel).