Just about to take my OW course to certify before a trip to Cozumel. One piece of equipment that I'd really like to own and not rent is my own regulator.
I really am JUST starting to look at these. Been looking at Oceanic, Scuba Pro, and Atomic. Really pretty interested in the Atomic for the 2 year service intervals.
I will primarily be diving warm water, and mostly on trips to Mexico. I'm willing to spend up to $550 if I need to.... this is one item I want to make sure is quality.
What brands should I be looking at? Any specific models?
1) I wouldn't buy any regulator until you have done your course. Some people decide that they don't like diving in the process of their open water training. Obviously, I don't know you, but that's a common consideration. Also, you will have a better idea of what to look for in a regulator once you have done your training.
2) How often do you plan to dive? If it's not very frequently, you might be better off renting a regulator for now. Remember, you have the ongoing cost of service.
3) Virtually any new regulator from a well known company will be fine for your purposes. Assuming that you are not going diving in very cold water, I doubt that you will notice much difference between regulators in the standard range of prices.
4) A dive computer and a BC have a lot more variables, and in my opinion a new diver would benefit from standardizing on those pieces of equipment and learning their specifics early (when compared to a regulator). All regulators are essentially the same, but you have a lot of options with a BC or a computer that you could consider (another discussion, but something that you might not have thought of.