Yeah, there's quite a few options out there. I would say just get a dressage saddle, but if you plan to do any trail riding or jumping in it, that wouldn't be a good choice. I'd say look for an all purpose saddle with a regular flap. Forward flap is for jumping, and it's not the leg angle you'd want for dressage. Sit in a few zillion saddles and look for something that will leg you leg hang down naturally without the flap getting in your way. Most people call all purpose saddles no purpose, but they are a good middle ground if you just want to intersperse dressage with hacking and trail riding. As for a brand under $400 that's not a total piece of crap, either a new synthetic model Wintec or Thorowgood, or you could probably locate a nice used Pessoa or Collegiate for around that price.
You just have to see your distance...you don't have to like it.