If you're ever going to be biking at dusk/night, you may want to consider a Luminox.
I really like this model, the F-117 Nighthawk 3401 PVD 'Blacker than Black'
-black PVD (physical vapor deposition) plated stainless steel 43 mm case with crown protector
-water resistant to 20 atm/220 meters/660 feet
-black PVD plated unidirectional racheting stainless steel bezel (marked 1 to 11
to keep time in second time zone) with bright Luminox Light Technology (LLT) "dot" encased in steel housing
and protected by sapphire window (BADASS)
-highly scratch resistant sapphire glass crystal with anti-reflective coatings
-multi-jewel Swiss quartz movement with date function and 10 year lithium battery
-TRITIUM :!: