I use the Sig IIs with my AX-7. Ayre and Vandersteen really sound great together. Highly recommended; you can do better but not for anything close to that price! I used to have Thiel 1.6s which were a bit more transparent than the Sig IIs but overall not as musical and full sounding. I have also heard the AX-7 (not in my room) driving Thiel 2.4 and Vandersteen 3A Sigs. Both of these sounded excellent but, if you like to listen at high SPLs, the AX-7 will start to run out of steam driving those loads. For whatever reason, the 3A Sigs are a bit more difficult load to drive than the Sig IIs. Another reason I don't own the 3As is that they're another 8" taller than the Sig IIs - that's a bit too much of a monolith for my living room!
I really like Thiels (especially the 3.7 which is flat out awesome) but prefer the Vandersteen sound a bit more (ie, comparing 2 Ce and 3A to 1.6 and 2.4). To my ears, they're more full and musical.
I've not heard the PSB, Linn, or Sonus Faber. You didn't say what your budget is but, if it were me, I'd also consider the Aerial 7T and Avalon Idea. At any rate, the Sig IIs would NOT be a mistake. Happy listening.
I really like Thiels (especially the 3.7 which is flat out awesome) but prefer the Vandersteen sound a bit more (ie, comparing 2 Ce and 3A to 1.6 and 2.4). To my ears, they're more full and musical.
I've not heard the PSB, Linn, or Sonus Faber. You didn't say what your budget is but, if it were me, I'd also consider the Aerial 7T and Avalon Idea. At any rate, the Sig IIs would NOT be a mistake. Happy listening.