Left crowns are very rare, especially at that price point.

Between the Invicta and the Nixon... I'd lean Nixon... but that is only my, like, my opinion.

Have you considered the 4 o'clock crown position given by the Seiko Black/Yellow/Orange Monster watches?... very comfortable on my wrist. The Seiko Monsters are probably the best bang for the buck watch in that price-range.

I also have several Oris dive watches with 4 o'clock crowns.. but those are out of the price range new. The TT3 diver has a 4 o'clock crown and (if lucky) could be found near 300 used.

There are several Panerai sterile-dial (Unbranded) clones available that are left hand crowned as well... but that watch style is a love it or hate it.