Hey, I wouldn't discount your Seiko's as being part of your collection. Regardless of which one you end up purchasing, you will wear your Seiko's so consider how the new watch will interact with your rotation. I like diversity in my collection. If your Seiko's are divers, go with the Longines. If your Seiko's are Presage's, go with the Tudor.  

Here's mine! Yours is in much better condition! 

I run a company that manufactures power conversion equipment such as power supplies, inverters, chargers, DC-DC converters, and solar charge controllers.

I am going to go with Tissot and Frederique Constant for bang for the buck at the moment.

It took me awhile to get here! I'm likely a bit older than you as my kids are all out of highschool now and one's almost done with university. I'm sure you'll get here too around the same timeframe. Enjoy the ride 

When I got seriously (read: could afford) into this hobby, my first watch was an Omega DeVille to commemorate a career advancement/milestone. This is my only three hander with date dress watch and very understated. From there, I decided that I will stick to one watch per brand and one watch per complication. 

Well I've found that this self imposed rule is very difficult to uphold. 

There are so many great watches from each brand that it is very difficult to stick to just one. However, I am sticking to this for now as it limits my collection size. I can see me breaking this though sometime in the future. 

The one watch per complication is not doable. For example, almost all my watches have a date complication. So I've made a diversion from this rule slightly and the rule became one watch for each purpose or uniqueness. So, I have a dress watch. I wanted a chrono so I decided that the Zenith El Primiro was the one for my collection but it easily could have been the Speedy. But since I had an Omega already, the Speedy was off the table. I have a one hander (Meistersinger), a mechanical alarm (Panerai), a GMT (Grand Seiko), a diver (Seiko-this one's almost a cheat due to the GS but these are my rules ;->), a rectangular (JLC), the value piece (Tissot) and a digital (Casio).