Tissot is an amazing company with many affordable and solid watches. Personally, I would recommend the PRX Powermatic 80. It looks the same but a much better watch all together. In the grey market you can get it below $500 or even some retailers may have it on sale because the approaching holidays.

If automatic, Tissot, Hamilton and Mathey-Tissot (just to name a few) have a nice selection of well made watches below $500. If quartz, you have lots of different companies in that price range, from Swiss made to others.