The DiNotte 140L actually has fantastic brightness from off-axis, it'll devastate any 2AAA blinkie you could add. For comparison photos of the 140L, the 300R, the CherryBomb, SuperFlash and Radbot, see this thread:

http://www.bikeforums.net/showthread...cs-amp-remarks

Tangentially, you might be interested in the Fibre Flare light sticks. I got a yellow one and put up some info here:

http://www.bikeforums.net/showthread...s-amp-comments

This place has pairs of the 12-inch red version for $45:

http://www.bikewagon.com/Bike-Access...ghts/tc254481/