I ride in to the train to get to work, which means that I hit the road at 6:00am and then hit the road on the way home at 5:30pm. It'll be dark by 6:00am by mid-September, and so I'm trying to think ahead about what kind of light I need to get. Any feedback on the lights below, or alternatives to look into would be great.

Just for the record, I'll be on a fairly busy but not terribly well-lit street for a large portion of the 6-mile trek each way. I want illumination not only so that others will see me (in addition to two blinking headlights and no less than three blinking and/or steady rear lights), but so that I can keep my speed around 20mph without needing to slow down to <15mph.

Here's what I'm considering:

NiteRider Classic
NiteRider TrailRat
CygoLite Hi-Flux
CygoLite DualCross

Basically, the more light the better. Mounting for the battery doesn't concern me much (water bottle-style battery, strap to top tube, etc.). I used a friend's NiteRider 15W light (NiteOwl??) last winter and loved it.

Hints/suggestions/alternatives? $150 or less would be fantastic.