Jason,
I have a small pond 1/8 acre (3500 sf)with a average depth of 4'. I so wish I would have built bigger. I let the pond sit for 1 1/2 years and then stocked 25 hybrid gills, 3 LM Bass, and fathead minnows. I supplement with fish pellets for the gills. The fish are on their third year and are Big, fat, and appear very healthy. However, I have to keep removing the small Bass, they reproduce like little rabbits. I aerate on a regular basis and use a " benifical bacteria " to keep the water nice. I have to stock fatheads twice a year to keep the bass fed. GO BIGGER, you will regret it if you dont, or do not stock it.