Reaplce Thiel 3.6's Tweeter

I want to experimenting different types of tweeters (soft dome or silk dome) on my Thiel 3.6. Please kindly provide your suggestions.

Music: Classical

Current System

Source: BAT
Line Stage: Counterpoint SA -11
Amplifier: Modified Counterpoint SA-100s (bridged monoblock)
Interconnect: Silver Audio Appassionata and Stealth M-21
Power Condictioner: PS Audio PS-600 for source and line; chang lightspeed 9900 for amplifiers

Thanks in advance.