Just checked out BikeSmart.com and they do seem to have good prices. Now I'm confused as to the difference between these two models though:

NiteRider RoadRat @ $60 with:
6 V Halogen Headlamp
Tough, durable design
Sealed push-button switch
Standard handlebar mount
Frame Mount Lead Acid Battery
9 hour charger

...and...

NiteRider TrailRat @ $90 with:
6 V Halogen Headlamp
Tough, durable design
Sealed push-button switch
Standard handlebar mount
Frame Mount NiMH Battery
9 hour charger

Why the different prices? Other than the battery shape, they don't appear to be any different.