Slightly pricey, but Citizens new series is really, really nice. 40mm with automatic Miyota movement and date complication.

https://citizen.jp/shop/collection/g/gNJ0230-59L/

Their series 8 is a step up. Made in Japan and also a Miyota movement. Super nice. Not a big fan of octagon bezels but the watch face and color scheme looks great.
@brian the flats sure would make opening it up easy