Just an informal poll for your favorite and least-favorite RD alert tones.
X band: Not sure. Most RDs use a plain beep. X isn't a threat around here. Beltronics has the most distinctive X band alert though, a bit annoying though.
K band: Best - V1. Classic sound dating back to the original CMI Escort. Worst: Escort 8500-series non-loud mode. Runner-up, Beltronics. Both are weak, hard to hear in a noisy environment.
Ka band: Best - Escort 8500 series loud mode. Runner-up, Beltronics. Worst, probably Escort 8500 series non-loud tones.
Laser: Best - Beltronics. Piercing and it gives a good indication of hit duration. Worst... don't really have one. Escort's lingers too long after the signal stops.
Best voice alerts: Escort (Redline, 9500-series). Worst... well, the only other RD I have with voice alerts is an RX65...
I've never owned a Whistler or (*cough*) Cobra so I can't really judge their alert tones.