For an extra $100 ($599) you can get an AppleWatch which has everything and does everything, and you'll spend so much (fun) time customising the faces and their complications with the apps and information you do or don't want to see at a glance.
For example I have watch faces setup for walking, boating, windsurfing, training, and a few generally pretty ones.
For an extra $100 you can have everything, and so much more.
e.g.
waterspeedapp.com/Pros: Too many faces and apps (that can be used as face complications) to mention.
(constant) Heart rate monitor, ECG, Blood Oxygen monitor, sleep monitor. More than you want or need. (?)
Apple have a dedicated precinct full of buildings and people exercising; running, walking, swimming, cycling, etc. etc. all day every day that they have a **** ton of data to precisely calibrate their fitness tracker, so it's awesome. (too many sports to list, but for example they include badmington, yoga, kickboxing, stairs, Barre (what's that?), basketball, social dance... you get the idea; some serious motion tracking has been going on to calculate what it is you are doing and how much you are buring)
Little touches, like if you receive a call and you place your hand over the watch it recognises this as it needing to shut up and go into silent mode.
Don't need wallet,
nor phone, while out and about anymore. Has wallet with cards and covid pass etc.
It's a (very, very sharp) screen, so it's not fixed in its form like most of the alternatives are.
Cons: Bands, while excellent, are a rip-off.
Initial setup was a pain as had to upgrade software on both phone and watch : \.
Might have to wait for supply.
Yet another distracting toy.