By using some name jocks, you get a couple things. First, as just mentioned, a little buzz...some jocks have enough of a following yet to give you a tenth or 3 in the ratings, something worth real money in a market the size of SF. Secondly, even on vanilla voice tracks, they can knock out tracks that sound better in less time that a Joe Schmo jock from Dingdongville. They also know what to do without being told in granular detail...something those who have hired and managed major market talent are quite aware of.