Whatever reg the OP decides to get should be based on a few things that I try to use when suggesting a reg to a customer.
1. What type of diving do you plan to do? If it is anything except warm freshwater 100% of the time I try to guide them to a sealed reg. Just makes care and service easier and more convenient.
2. Do you plan on doing any cold water? Below 50 degrees? If yes again a sealed reg.
3. Are you planning to travel? If so lighter set may be beneficial but not totally necessary.
4. Do you think that you will use Yoke or DIN valves more? If yoke or a mix favoring yoke then go with a yoke reg.
5. Any plans at all to go tech or buy DIN tanks? If yes get a DIN reg and use an adapter or buy the yoke kit with it. That way when you travel you can take the three minutes it takes to swap the fitting.
6. What is your budget? If you tell me unlimited I might suggest the Edge Titanium for 700 bucks. And then probably try and talk you out of it. Unless you tell me you will be traveling all the time, doing 300 dives a year, and want the thing there is no need to spend that much money for a reg.
If you tell me primarily vacation dives a few times a year, warm water, no real deep stuff, and want light and compact I'm going to guide you to the EXP for 245.00 with an Escape Octo for 95.00. I won't even suggest moving up to an Epic unless you ask.
Ask about the Epic specifically and I will give you your options there.
Tell me you want to dive long hose, have plans for tech, or just want to observe rule number 6 all the time (which is always look cool) I'll suggest the HOG if your budget allows it.
To come right out and try to sell you the most expensive one in the line right off the bat is ignorant IMO. I'd rather you spend less and dive more because the truth is today that the average OW diver would not be able to tell the difference between a 250.00 adjustable and a 600.00 one if the guy setting up the less expensive one knows what he/she is doing.
Now as to service. The average reg does not need rebuilt every year. Unless you're doing 200 plus dives a year. An annual inspection should not cost more than 40 -50 bucks. I charge 35 plus return shipping. The two year rebuild is going to run you around 135 plus return shipping or so depending on how well you care for your regs. Abuse them and it'll cost you since I have to spend more time cleaning them up.
Now that rebuild is recommended. May not be required on all stages. If your octo is good and everything checks out it makes no sense to rebuild it. Maybe it can go another 6 months?
But the best part is if you miss a service by a month, two months, hell a year - it's not going to cost you any more money. If you decide that you are taking a year off, or just not going to dive for the first six months of the second year and want to wait to send it to me to service that's fine. NO penalty. No rap on the knuckles. The worst that may happen is you have to wait two weeks to get it back because I have classes, other work, family issues, etc. Normally turn around is a week from the time I get it in my hands. Send it in during the winter and if I get it on Friday it'll get done that weekend and back in the mail on Monday.
If I can't do it I'll let you know. I sent one customer to another dealer just last month because I could not turn his reg around fast enough for him. I had too much going on.
A sale of a reg, BC, BPW, or anything should be based on the needs of the customer. Not on the shop's quota. I have found that doing that has brought me more business than pushing the higher priced stuff right off the bat ever would have.