I am still in the design and funding phase of my pond.(seems like this is a long phase)

Anyway, I am planning on installing a small pond, probably less than 1/4 acre due to space/easement restrictions. This pond will hopefully support warm water species. Max depth 8' with a 4-5' average.
To help with the "funding" aspect of the project the wife would like something other than a "redneck swimmin' hole". I am planning on a small sandy beach for the kids and a nice flagstone patio adjacent to that. I know this might not be most of your idea of a "bass pond", but it is what best fits my family. (read: funding)
Now for the question. If I built a small 10'x10' pond above the main pond and created a 2-3' waterfall that flowed for about 5' and then dumped into the main pond, would this provide much aeration? I am not trying to get out of a traditional aeration, but just wanted to know how much effect something like this would provide. Also, am I drastically increasing my evaporation?
I also need to look into this cost of pumping water uphill vs air down hill.
Thanks,
Joe