Horsecrazy, welcome to the saddle-searching merry-go-round
We'll get you into a good saddle in your budget. Here's what I'd recommend though, to get you on the right course:
Instead of finding affordable saddles here and there and then asking for our input, lets start a little more basic. It seems that you're looking at the whole range from Western to endurance to English saddles. Those are some pretty different saddles and riding styles.
What type of riding will you be doing? If you'll be doing any kinds of Western disciplines, then you need a Western saddle. If you're doing any English disciplines, you need an English. If you're just going out for a nice little ride and just want to enjoy your horse and the country-side, then you can use anything. However, if that's the case, tell us about your riding style. Do you like the secure feel of having a horn and a deep seat - go with Western. Do you like being able to feel your horse and you like a light saddle - go with English or Endurance, etc.
So I suggest that you tell us about your riding style, what you like and don't like, and what you plan on doing, and we can help suggest what you should be looking for. Then you can focus on finding the right thing, and we'll be much more effective at giving thumbs-ups or poo-poo'ing them as you find them.
I'm glad you got the seat size and tree-size pretty much narrowed down, not let's get the style narrowed down.
And Speed's input on the above saddles is spot-on.
Take a look at the threads I've linked to here to see some examples of excellent quality saddles that people have found at good prices. You're looking for something like these, if it's an English saddle you're after. Looking for a saddle on a budget? Kind of took a gamble here, what do y'all think? Bevel saddle - worth it?