Mac vs. Linux for Python Development

[twiz]

Hello,

I'm sure this is a common question but I can't seem to find a previous thread that addresses it.   If one one exists, please point me to it.

I've been developing with python recreationally for a while on Ubuntu but will soon be transitioning to full-time python development.  I have the option of using a Mac or Ubuntu environment and I'd like to hear any thoughts on the pros and cons of each. Specifically, how's the support for numpy and scipy?  How are the IDEs?

Since I generally like working with a Mac, I'd like to hear if there are any significant downsides to python dev on OsX.  

Thanks