There is one other thing ya forgot to mention - amount and size of bait. (I think it's GPH instead of GPM) Overall, if ya have 80 gallons in it, that water will be completely recycled about 4.75 times in hour, put a spray bar slightly above the surface and ya'll have plenty of aeration and filtration...
You are right its not GPM, and its not 383, as the specs for the pump list the "filter output" at 245 GPH and the "pump output" at 383. I'm not exactly sure what the difference is but I'll use the 245 GPH.
I plan on keeping small/medium shiners in the tank, nothing too big, 2" - 4" and probably a couple hundred I'm guessing would be reasonable.
As for a spray bar, I have read that these are not the best option for delicate bait since scales and protective coatings are more easily removed--whether this is true or not I have no idea.
As for turnover, I have seen different rules of thumb--one is that I should be ideally turning over 10x the amount of water in the tank per hour.
Instead of the spray bar, I think I am going to get this 700 GPH Oxygenator setup from Rule:
http://www.amerioutdoors.com/Rule-255.htm?feed=Froogle#What that pump does is draw in air prior to circulating the water back into the tank. It also allows you to adjust the level of O2 being mixed with the water.
So a 700 GPH aerator and the 255 GPH filter will get me 955 GPH, if you figure the system efficiency is around 85% that is approximately 800 GPH being filtered/aerated/turned over, or 10x my 80 gallons of water.
I suppose if this is too much I could up the water a bit and add some plumbing to slow the pump down.
What do people here suggest as an ideal turnover rate?