For a reef, you should have atleast 20x turn over for you 75g. Which is 1500 gph. With your current flow, you are at 1600 gph. So, you are just fine IMO.
Look at me.......I have about 30x turn over in my tank and all my corals are doing great. Xenias are growing like a weed and my fish have no trouble swimming around. Some very experienced posters say you can never have enough flow.
The only reason my flow is so high...is because of the Koralia jets. Like I said...they are not a concentrated stream. I would never try 30x turn over with just maxijets. It would be a sand storm.
good luck and keep us posted