I've heard that they are supposed to be very good. What regs would you say are easier breathers??
They are good, that's why I had one on my bail-out bottle. Its a very good reg, no issues with it, if you like Oceanic and you have a solid service center in your area then go for it.
I found that I prefer the Zeagle regs, at least here in the US parts are extremely easy to come by, servicing them is very easy, and even the $265 Envoy Deluxe out breathes the Oceanic. I prefer the DS-V because I need the cold water performance and its is a sealed reg where the Envoy is not, if you are a vacation diver that is an unnecessary price upgrade that actually hurts performance.
Nearly any regulator from reputable companies on the market today is a "good" reg. Its hard to distinguish better from a pile of good. The "old" thought was any reg that could perform at better than 2 Joules/litre work of breathing or better was a great reg. But that was 10-15 years ago and nearly every single reg on the market is better than that these days, with the Sherwood SR-1 taking the cake at about 0.6 J/l. And most all are under 1.2 J/l if I recall correctly.
I would recommend that you start with a visit to your local service center. Even if you don't plan to buy from them, its very likely they will be servicing it. if you can't get service then it doesn't matter how good a deal or regulator you get. find out what they service, take a second to talk to the service technician if you can, ask to look at their shop and their flow bench. see what brand of parts they have the most of on the wall. These things will help you determine what they see the most of and therefore should be the most competent at servicing and tuning. if they don't have a flow bench, find a new shop, one can not properly tune a reg with a flow bench.
I would also recommend that you take the reg into them before you dive it and have them "safety check" it, they should do a basic assembly check, verify the IP and cracking pressures. I haven't yet seen a reg out of the box that was properly tuned and this check will fix that.