Wide North is the Canadian Distributor of Yildiz shotguns (out of Drumheller, AB). I was in communication with Jonathan last year about doing a review of their SXS's. Ran into him again at the Calgary Gun Show and we talked about getting on top of that. Don't know when we'll have an evaluation unit in hand or the review finished, but it could take several months for the whole process.
Sharptail and I wrote a review on CZ's Bobwhite. It's posted on this site. If you haven't already read it, let me know and I'll find the link for you.
As Longwalker and Ashan have already stated, many fine SXS's can be obtained in the used market in your desired price range. The key is not to be in a hurry. The more time you can spend shouldering a variety of models, the better the chances of you finding a good fit and, frankly, being patient enough for the right deal to come along. You have a shotgun that is serviceable for most applications in the meantime, so there should be no rush.
You only need to search some of my recent posts to see some of the excellent pieces that can be found by those willing to sit on their wallet until the right opportunity comes along. I won't bore you with the complete list, but in the last year alone, I found a graded Ansley H Fox, a Webley and Scott, and an extremely rare and well made Saxton of London (one a 12 ga., one a 16, and one a 20). None of those cost me as much as you're willing to spend. All of them are worth more.
When the day comes when you're satisfied that you actually know something about what designs and features you like, you can round up all your loonies and go have a fine SXS made to your specifications. It'll cost a great deal more than your current budget. Your current budget, BTW, is higher than most guys are thinking when the bug first bites. That's a good sign.
I wholeheartedly welcome you to the fraternity of those who recognise and appreciate fine craftsmanship.