Not sure what your budget is but if you use it fairly continuously look into a rotary screw compressor. They are in a different league than piston types IMO.
I got really lucky and was able to purchase a used Kaeser unit for well under half the MSRP and it only had a couple hundred hours on it. Don't think I could justify paying full price though.
If you use it sporadically though a rotary screw also wouldn't be worth it. This was for a manufacturing operation that ran a good part of the day everyday.
a kaeser would be like 8 grand... and after talking with some people I think a piston style fits my needs better. the rotary style are more set to go 100% all day everyday. My needs are heavy use 3 days a week and intermittent the rest of the days.
I have a farm and my brother does some autobody work in our shop. We have a 22cfm c-aire machine now, but real world is about an 18-20 cfm. we have gone through the pump twice and it's on its second motor. the pump is starting to make noise again, so I don't think it has long. my brother had two DA's going for about 4 days and I think that ate it up.
my neighbor swears by hydrovane rotary. I can get one of those cheaper than the QR quincy. the maintenance is a little more involved from what the dealer tells me, but salesman advises it only needs to be done every 2000 hrs vs every 500 on the piston quincy. He also advises the rotaries are less efficient, which isn't a huge concern for me. I know almost all high demand shops are moving to screws/rotaries, but after talking to the salesman, I think the piston fits our needs better.