I happen to love Redken's workforce 09-- it's a volumizing spray that has good medium hold (flexible hold)-- it's easy to work with and virtually undetectable that you've used spray.
On the total other end of the spectrum, I looove Redken 18 Quick Dry spray. This is the hard core fierce spray of my dreams... it will hold any style and even stands well up against humidity. It is intense, but perfect. A little goes a long way-- I use it when I am going out for a night on the town.