I'm a big fan of Artesian. They have been around since 1977. That's a long time for this industry. Their Island Elite line is pretty awesome and feature packed. Make sure you get the dual footblasters. Those are the best foot jets in the industry. They put an entire pump just to power those, I believe.
There are other great choices in that price range as well, but you certainly can't go wrong with that spa. They are a well made and reliable brand. Good, powerful jets. I recommend getting their pro pure water treatment system. In my opinion, it is as good or better than any water treatment system available.