"Diving watches" (in the colloquial sense of a normal watch that can go really deep) are a meme - literally everyone just dives with a computer these days. Having a watch is not really sufficient anymore. Also, most "dive watches" aren't even really rated for diving at the depth listed on the case - you can find threads about this on various dive forums. I have a mechanical watch rated for 300m, but I can't think of any reason I would actually take it down with me on a dive (especially to tech diving depths).
If you want the form factor of a small wristwatch, you can get a Garmin or Perdix dive computer that looks like a watch. Otherwise, there are tons of good options. You will probably want to spend minimum $200 for a Mares Puck or something. I use a Mares Quad. It's fuckhueg but works great and wasn't too expensive.
You also need to think about if you want air integration with your computer. That usually adds like $2-300 onto the total cost. I personally don't have air integration but I kind of want it now.
I think I'll probably get the Garmin Descent Mk2 when it comes out, or a next-gen Perdix computer. I'm expecting to spend about $1000 on that.