@sjbellers - adding to unsound's post, your "Thiel CS3s" are getting upgrade attention in parallel with the CS3.5. The Audiogon Thiel Owners' Forum may be of service to you.
Thiel CS2
I just recieved a pair of Thiel CS2 speakers for a VERY good price and was looking for information, opinions, and comments on these speakers as I am not familiar with Thiel at all. Anyone with experience that would like to share would be appreciated.