Replacing new tweeter voice coil

[umut1001]

Hi.I want to improve sound of my Westra silk dome tweeters.I want to use a better sounded coil. Here is the link of Kapton voice coil.Do you think it will be an iprovement?
DOME TWEETER HORN DRIVER VOICE COIL,KAPTON,REPAIR, 1" - eBay (item 130362567972 end time Feb-27-10 08:38:04 PST)

 

[umut1001]

My Westras

And here is the my westra tweeters I show with red sign.They are rated at 94db