Wife and I just got certified and are looking for regs. Will probably dive about 10-15 times per year. Mostly freshwater at our local lake, 75 plus degrees water temp and once, maybe twice each year to Cozumel. Have basic equip plus bc's. Am now wondering, for the amount of diving we'll be doing, which would be the best, most economical regulators. The mk2 with the r380 or the mk16 with the r380. Not much difference in price, $189 and $209 at leisure pro I think. Will buy at LDS and expect to pay about 50 bucks more. For our level of diving, which I expect to pretty much stay the same, would it really matter which we got? Any help appreciated. Thanks, GT