As others have mentioned the Philips bulbs are about as good as you can get but they are also the most expensive. And that you can save money by going with the IKEA lineup but the quality isn’t as good. But your third option is Innr bulbs which sit perfectly in between Philips and IKEA for quality and price.

TLDR

Philips - best quality / most expensive

Innr - medium quality / middle pricing

IKEA - lowest quality / least expensive

Note: when I say the IKEA is the lowest quality, I just mean between these three. They are still miles ahead of any of the no-name brand crap you can get on Amazon.

I use Syncthing for files/photos/videos and Nextcloud for calendar and contacts.

Amazfit with Gadgetbridge.

I bought one a couple of years ago and it works great. Gadgetbridge keeps all the smart functionality local to your phone.

I’ve heard good things about the Garmins as well which I think are mostly also supported in Gadgetbridge.