If you want to expand your arsenal, without going overboard, add some wooly buggers, black, olive, and tan. Some clouser minnows with grey, chartruse, and something dark wings.
I would stay around size 6 to start.
You won't have as much fun though as you are on top, IMO When it gets really hot the above can sometimes save the day when fished at the bottom of shoals that have some deeper water.