Western Saddle question

I've had a Wintec western saddle for about 3 years. It's still in great shape, but I'm not entirely convinced it fits either of my horses well. I think it's too small in the front for either horse. It might be the pad I'm using, but I somehow doubt it. I think it's more an issue of a small saddle. Paperwork says "Semi QH bars"... I thought it was a 15" seat, but there's a little stamp on one of the girth-keepers that sure looks like "16" to me.

I'm much better at English-style saddles.... I have a Wintec Pro dressage saddle (17"), that's got the "one smaller than the avg gullet" in it - Chewie only. I've also got an HDR eventing saddle (17") that fits Chewie much better than Romeo - it seemed to just sort of lay across Romeo's almost non-existent withers.

What should I be looking for, and better yet, where can I go to find something durable, yet cheap? I think synthetic is okay, but I'd prefer regular leather, for sturdy-ness, if nothing else. (disclaimer... I'm looking for a western replacement... the english saddles are fitting both guys enough of the time - they fit Chewie great, and that's more often what he'll be wearing)

Thoughts?