New to diving I'm begining to make equipment purchases however I can't decide on the usual Octo as back-up second stage or i've been lookin at the Aqua Lung Airsource 3.My Primary second stage is the Aqualung Mikron.I used the typical Octo on my confined and open water dives,but the thought of looseing that extra hose is appealing.I know I would need some getting used to the Airsource 3,but since i'm just starting out I thought it would be a good time?Any thoughts or opinions?Also what about the Vyper Air vs Galileo Luna?I used the Cobra 3 and liked it,but the thought of losing another hose once again is appealing.