Getting ready to head down to Mexico for an extended stay. I have mask, fins, computer, and was looking to pick up a bcd and regulator. Do I need to purchase my gauges and octo at the same time? Can I use a Cressi gauge with a Scubapro reg? I'm seriously considering the Scubapro Seahawk 2 with mk11/C370 reg. Opinions? Advice? Thanks. New here and fairly new to diving but got about 50 dives in in the Philippines last year and I plan on doubling that this year between Mexico and Honduras. Just under 75 dives total currently.