I use the adhesive backed laminate (oak, since I use oak plywood) for my edges.
If you want rounder edges with the look of wood you could take a piece of lumber (whatever matches your plywood) and rip the width to the exact thickness of your plywood.
I'd probably plane the thickness down to just over 1/2 inch before hand. If you do, make sure you plane the piece before you rip it and have the piece wide enough to get all the needed pieces from it. That way all your edging will match and be the exact same thickness.
Then use a round over bit on the router table to curve both sides, meeting in the center.
Cut it to length, glue it, and brad it.