Like in Financial sales, I can't recommend a specific brand for liability issues, but as an indication, for first stages I have 2 Mares, 2 ScubaPro MK25's, 4 Apex DST's, 1 cheapo Taiwan replica, and 1 Drager 'reducer' for my Dolphin. I like them all, but I only trust my ScubaPro's and Apex's...