Be careful buying fish in the Spring...often hatcheries are dumping their inferior runts approaching age 1. Genetics is vastly important. Unless 6-8" HSB and SMB are available in Spring, take a pass until the Fall when fish that size are available. Resist the temptation to save money on the Spring fire sales from hatcheries - initial stocking is no place to cut corners considering the vast time, effort, and fiscal resources dedicated to the pond development.