My PO 2500 42mm Black bezel/orange numerals is probably my #1 candidate for 'last man standing' if I had to clear my watch box. Astoundingly versatile on the bracelet, looks great on Omega's rubber strap, nice enough to wear anywhere I'm likely to go, tough enough to actually wear for SCUBA, and has a bezel you can operate reliably in the water, unlike SMP 300m's.

All that said, if it doesn't warm your heart when you wear it, and you don't think it's likely to change, move it on. Life's too short.