Sorry to disagree with all the previous opinions but there is nothing wrong with Mares Regs. ScubaToys services Mares Regs for the same price as any other Reg they carry except ScubaPro, which is higher.
Parts are easily available - the Mares parts are interchangeable between anything from the R12 to the 52. They are as reliable as any regs out there. And for cold water, they offer a line of all metal 2nds that are superior - unless you want/need an "adjustable" 2nd.
DD - The Dacor problems have been well hashed out - Dacor was in bankruptcy when Mares bought them - Dacor's suppliers had already discarded all the Dacor molds because they were worn out (Dacor had not paid for replacements). All Mares was left with was the parts on hand and no way to get new ones. Obviously a bad corporate purchase but if you put yourself in their position, do you spend money to retool for a brand that was old technology or spend your $$$ on tooling for your improving your premium brand (no brainer - duh!!). They did offer a trade-in program for owners of old Dacor equipment
. But this is a 10 year old issue - GET OVER IT!!!