I use Maxijets and Seio's. If I had to do it all over I like thr ones I am seeing now that are magnetic and go on either side of the glass. I also like the way they move water. The nearest LFS is 135 miles away and I just saw them for the first time a month ago. Inside the tank looks like a boat propeller surrounded by a cage. Sorry no help on remembering the brand.
As far as flow or turnover rates are concerned I can help you though.
Anything that moves water in the display tank (not the sump counts!)
So if you have anything running up into your tank from the sump count it's flow rate. Anything from powerheads, skimmer, filter, etc moving water in the display tank count it!
Now add up all manufacturer listed flow rates and multiply by .75 (75%).
That will give you a fairly good fix on your systems overall turnover rate.
Try to mix up flow patterns to prevent laminar or straight line flow. You want it more chaotic. Shoot for 10 - 20 X your tank volume.
In my tank using the arithmatic I laid out for you I have 4800 gallons per hour in a 210 gallon tank. Everything waves and is very healthy.