Field watches are pretty versatile aesthetically and in terms of use. They are basically casual watches, but look OK dressed up on a nice leather strap too.

In that budget: Seiko 5 field watch. Vaer S3 or S5 field watch. Between these two, Vaer might be more durable because of its more scratch resistant sapphire crystal. Seiko is a much bigger and well known brand.

For casual and outdoors and work days, wear it on a metal bracelet or nato strap. For weddings, nice dinner, church, put it on a dressy leather strap.