Good First Dressage Saddle?

I have been taking dressage lessons for the past month and have fallen in love with it! So much so, that I am looking to sell my Collegiate All Purpose saddle and buy a dressage saddle instead. What would you guys recommend? I am a freshmen college student, so I don't have thousands to spend. However, I want something decently made that I can ride in for years and potentially later show in the Training and Intro levels.

I'm going to need something with a wide tree for my wide backed Thoroughbred/ Percheron and Quarter Horse mares. I will probably need a 17 1/2 to a 18 seat size.

I have a Wintec Close Contact that I've had for years, and I love its changeable gullet system. Consequently, I have been looking at the Wintec Pro Dressage saddle (old version-- the new one looks ridiculous) and also used Wintec Isabel's online. From what I've researched, these seem to be pretty good saddles, but I didn't know what else you guys would recommend.

Thanks!!

I have heard very good things about the Wintec Isabelle, I don't have any experience with any other models, I'm sorry.
Sometimes you can score an awesome deal on Barnsby (*drool*) or other "expensive" names on Ebay...
Welcome to the dressage world by the way, good to have you :)

Yep hunt around, see what good second hand deals you can pick up around the place. What saddle you get depends on what YOU like not what other people like, for instance, I HATE isabelles, I feel like I'm being forced into a position and trapped there, they swing my lower legs back and tip me forward (and usually I have the opposite problem!)... but some people love them!! Up to the individual.
I'd go out to your local saddlery and see if you can try out as many saddles as you possibly can, even if they're not in your price range, at least you'll get to have a feel of what you like and what you don't. Also, some saddles will just NOT fit certain horses, my old QH x appy mare had lower withers and not much shoulder, and I found that everything other than an ancient wintec slid up onto her shoulders.