By trimming a few creature comforts, Aqua Lung has lightened the Pro LT by a full pound and slashed $100 off its price tag, compared with the Pro QD model. Most important, it left all the basic performance in place. Divers get the upgraded SureLock II integrated-weight system, lots of cargo capacity, a stable backpack and excellent ergonomics. MSRP $450 CONTACT aqualung.com