I feel it's a huge risk not being able to listen to the speakers first hand and bringing them home based on recommendations on the forum. Having said that, judging from your description the Thiel CS3.7 may be a better choice than the PMC EB1i. I have listened to the EB1i couple of times and although they sound very full and controlled with exceptionally deep bass, they are not the last word in micro-dynamics, nuance and tonal purity. The PMCs have good macro-dynamics, impressive scale and can go loud though. As Shadorne mentioned, the IB2i is at another level with higher degree of transparency probably due to the quality soft dome midrange driver. Unfortunately it is out of your price range and may not be optimally driven by the Mac amps.
The Thiel CS3.7s are on the analytical side with a lot of high-end detail. A friend who's ears I trust felt that the 3.7s presentation is too forward and bright. It's probably due to the room and electronics though. Your Macintosh amps which lean more towards warmth and smoothness may combine well with the Thiels.
At the sort of price range you're looking at I urge you to consider all your options carefully. Apart from Sophia III you might want to look at the Magico as well.
Good luck.
The Thiel CS3.7s are on the analytical side with a lot of high-end detail. A friend who's ears I trust felt that the 3.7s presentation is too forward and bright. It's probably due to the room and electronics though. Your Macintosh amps which lean more towards warmth and smoothness may combine well with the Thiels.
At the sort of price range you're looking at I urge you to consider all your options carefully. Apart from Sophia III you might want to look at the Magico as well.
Good luck.