I'm about to start a Divemaster course and planned buying an Apeks ATX50 regulator. It seems to gather pretty good reviews from people around here. I talked about this with my instructor and he tried to dissuade me saying that it is a rather old design and directed me towards the ATX100 (or ATX200). The difference in price is about a couple of hundred dollars here in Israel and I would rather not spend the difference. The instructor doesn't work or is in any way affiliated with the diveshop selling Apeks, he is actually selling Scubapro (above my budget in Israel). Any comments or suggestions?