Is that a tank solo or must?

Not a popular opinion but the constant Snowflake suggestions bore me. Not a huge fan of Ti, the size is slightly large, and I like something slightly less trumpeted. If you like the “snowflake” dial, I’d go for the SBGA407. SS case that is of a classier design IMO. You have four on bracelets and two on straps excluding the G. The “skyflake” on a strap is classic.

​

That said rules are meant to be broken…Speedmaster Pro ;)

Navi or GMT Master ll

Rather uncharacteristically for someone who is not a fan of the brand, I was actually going to suggest you consider getting a Rolex. Not a Submariner (since you already have several dive watches) but there are plenty of interesting vintage pieces available at (comparatively) affordable prices—the possible catch being that they will mostly be smaller, which might not work for you given that, from the relaxed shape of the pillows in your watch box it looks like you may have a larger wrist.

A chronograph, however, would seem like an obvious choice. That basically eliminates Rolex but the Tudor Black Bay chrono is in the same bracket as your 300M and there are so many other popular offerings from Hamilton, TAG Heuer, Zenith and Breitling.

Personally, though I’d be looking for something a bit off the beaten track. I have a huge soft spot for the Reverso, and though sadly the Reverso Tribute Chronograph is out of my price range (and probably yours too) a pre-owned Reverso Gran Sport Chronograph has an earlier version of the same 30 minute flyback chronograph movement and can be had for a fraction of the price.

Or if the curvy, almost-tonneau case is a bit too 90s for you, then the Reverso Squadra Chronograph offers a more contemporary look, or consider the quirky-but-classic Reverso Memory with a traditional Reverso art deco front dial and an unusual monopusher 60 minute timer on the reverse.