Steve, I suggest doing a budgt analysis. Assume 5% survivial on less than 4" and compare cost of stocking pure Florida of larger size >10" and assume 80-90%% survivial-compare. If close go adult route it has a quicker impact as well on genetics. Most times if available no brainer to go with larger fish. Also when stocking larger highly recommend tagging with generic cheap unnumbered floy tags for that cohort. This protects your investment.

Greg Grimes
www.lakework.com