I don't have the Amulet, but I do have the Rendezvous and I love it. When I was saddle shopping last year, I wanted something with an adjustable tree for my young horse. I went through A Bit of Bling and sent wither tracings to them. The store passed them onto Laser and they recommended the Rendezvous as the best fit. They shipped it to me for a trial and I kept it! It fit my horse perfectly, and I loved the way it rode.
The quality of the saddle is great, and its barely showing any wear a year into it. I would definitely talk with Laser to see what they recommend. Their customer service is good. I was having a slight issue right after I bought the saddle and they got back to me really quick with some things to try (which thankfully worked).
Anyway, if the Amulet will work for you and your horse, go for it!
I was looking into getting the ThinLine Laser Amulet saddle too. I called the office for more information, and they actually have a special sale running for the Amulet saddle. I would call them, and see what they can do for you.