Marc-André Couture;6205965:
I would like you suggestions on what Reg I should be buying...!! . . . Now I only dive in the warm water during trip in the south but would like to start diving more in Canadian water.. much colder and maybe later under ice... . . . budget around 800 to 1200$ . . . Maybe I'll buy a wireless dive computer later and maybe a Dry....
You want an environmentally sealed, 'mid-range' regulator with 2 HP ports and at least 4 LP ports, in a brand line that can be easily serviced at a location near you. There are literally at least a dozen (or more) regulators that would fit the bill in terms of cold-water suitability, appropriate performance, and port number, with the 'local service' aspect being a factor to help narrow the field. And, you can certainly get what you want for substantially less than $800.
Having said that, start by narrowing the field on the basis of available local service. Do you have a LDS that you like dealing with, that is close to your location, that has earned your respect? If so, what lines do they carry? Even then, you may ultimately end up in a 'coin toss' situation, because you may find that there are several available brand lines that are locally serviceable.
Some personal preferences: Apeks regulators are certainly 'high performance' regulators, in general. I have a number of them, and can easily recommend them. In the Apeks line, the XTX 50 with the DST first stage is probably the best choice, because it has 2 HP ports. I personally have never found a turret to be useful, but a number of people like them. If the DS4 had a second HP port, I would recommend that, but the DST will fit the bill. I wouldn't spend extra money for an XTX200, even though I own one.
Zeagle regulators haven't been mentioned so I will add that name to the mix. They are very functional, and although I have a number of Zeagle 50Ds, my personal favorite is a Zeagle DS-V, with two ZX second stages.
Subapro regulators are also very popular, on the basis of perfomance and durability.
The list can go on, but if you have an available Apeks dealer, you won't go wrong with the Apeks brand line. About the only major brand I would personally stay away from is Mares, and then ONLY because it seems their parts availability is unpredictable. I have a Mares MR12 regulator which is a great unit, performs well, is durable etc. And, the shop where I teach is a Mares dealer. But, it seems like virtually every Mares order is 'shorted' on something, It is frustrating, and I can't recommend the line for that reason alone.