From direct experience - the $28 Terralux flashlight I mention above will outshine by a HUGE margin the Tikka, Spot, and likely the Princeton tec EOS. Seriously, it's not even in the same league - those pure headlamps are jokes compared to a hi-output 2 x AA LED flashlight. Before you drop the change on a headlight or dedicated bike light like the Spot, you really should seriously consider Terralux or Fenix.
The Terralux is at least 5, if not 8x brighter than the Terralux. The Tikka is so dim on max power that I can't even run with it. It works great for walkers, cavers, or slow runner, but for faster runners and any cyclist, it's not even close to marginal for seeing.