elitest jerks had some nice pretty graphs on how much haste you want. The jerks over there say that there are gaps when haste does not help you.

http://elitistjerks.com/f79/t27016-e...iscussion/p59/

This thread has been moved off their main page so it hasn't been updated for a while. The problem with elitest jerks threads is they get up to 60 some pages. It is hard to read through all that stuff. But they do have some good information.