Stinky is great, and I'd follow her advice.
-but-
I usually keep the bottom branches. And I do have a good reason to do so. When I want or need seeds, I only pollinate the lower branches of the best looking ladies. (I use a red twist-tie to mark pollinated branches) This allows me to harvest the seedless buds when they're ready, and if need be, I can keep the lower branches growing until the seeds are mature. Works great.