Thiel Owners

Hello,
After asking questions about amp choices I was encouraged to join in on the Thiel Owners Forum. I currently own the original Theil 2.4's I purchased them brand new, I believe just about 12 years ago , I think? I know that the 10 year warantee is expired but in all the time I owned them Thiel was always very good to me. For some reason, and we could never figure it out, I lost the coherent driver on the same right side speaker, twice! Thiel replaced the driver on both occasions with no hassle. What I am wondering is since the 2.4's and the 2.4 SB's use the same dimension of drivers is there anyway I can upgrade my standard 2.4's to the 2.4 SB's?
Also I am currently trying to decide between the Ayre V-5xe, that was the amp I used to drive them with before, or should I go with the Pass Labs X250? The V-5 is $2,750 and the Pass Labs is $2,600. Both amps are in great condition the Ayre is in Black (which was a $250 up-charge) and it is the original owner. But the Pass Labs beats out the Ayre by 100 W/Ch @500 W/Ch @ 4 Ohms. Anyone have some good advice for me?
Thank You,
David

I spoke with Rob at coherent source and he is sending me the upgrade components for my original 2.4's to make them 2.4SE's. Also I am going to send in my grill covers to have him put on some fresh ones. After 12 years of sitting in the house they do show a little age. I purchased the speakers brand new and have always loved them. He told me that they will sound even better with the changes I will make. I also just picked up my old amp that I loved as well, the Ayre V-5XE. This one is a rare one as it is black and at the time Ayre charged an extra $250 for the black chassis. Right now I just have a Marantz AV-7701 Pre-Pro that I use with my HT set-up, but it does have balanced pre-outs. I will eventually buy the Ayre K-5x, there is one on Ebay right now for $1,600 and I am very tempted. I would send it into Ayre and for $1,200 they would upgrade it to the K-5xeMP. As for my source I just bought an Oppo UDP-205 player. 

Ya,
I told Rob about the driver issue and he also was scratching his head. One of the drivers actually separated where it is cemented to the magnet. The other one started making a distinctive cracking noise on any high-frequency recording.
Well if it was the amp or anything else upstream I am starting out with different gear so it shouldn’t happen again. I am anxious to get the V-5xe in black. I remember when I bought mine but at the time could not afford a new one so Agon to the rescue. This one is a one-owner unit and I had Ayre look up the Serial number. The unit was made in early 2008 and has never been to Ayre for any type of repairs or work.
I sure am tempted as there is a K-5x pre-amp on Ebay right now for only $1.600. If I send it to Ayre for $1,200 they would upgrade it to the full K-5xeMP current model.
I am looking forward to getting the caps from Rob along with some high quality silver solder. He told me with the new caps that I will definitely notice the change in sound. The only problem I am having now is trying to find good IC’s but at a price that does not get close to the cost of the actual components.