Zeherah of http://www.femaledwarf.com/ fame has unfortunately stopped updating the absolutely brilliant tool that was the Hunter DPS Analyzer. Having used a version of this spreadsheet since the time when it was actually a spreadsheet at Elitist Jerks, I am very sorry to see it go, although I wish Zeherah well and thank her for all the effort it took to keep it up to date.
Happily, there is a new tool updated by Esoth:
...although considering the gear choices in raiding are currently extremely straightforward, it probably isn't going to get much use from me in the near future.
More useful is http://www.noxxic.com/wow
...which I found extremely helpful for spelling out situational shot priority for Survival (there are guides for MM and BM as well). Definitely useful when DPS is a limiting factor for boss kills; my guild managed to kill Mythic Twin Ogron this week and the last wipe before the kill we were a few % short before someone reminded everybody about Augment Runes.
I'm still a bit shaky on SV DPS compared to BM DPS, but improving as I get more comfortable with it.