Hello. I need to get everyone's opinion and input.

I am a newbie on Mac OS X and Unix. Mostly works on Wndows clients but wants to expand my knowledge as an IT guy not just in Windows but also in Macs.

Salary-wise, which OS X Snow Leopard gets the higher salary and can get an IT guy professional advancement farther - OS X Server or OS X Client?

Education-wise, which can provide stable foundation on OS X?

Thank you.