me is the new "switcher", change to mac because want to have a laptop that is worth the technology and not just some branding... after looking out vaio, hp, dell, compaq, and IBM, finally settle on apple because the hardware technology offers are simply too "irresistible"... isight, magnetic power plug, slot in cd rom, keyboard highlight and light sensors ... these are creatively built-in to make our life easier (not to miss iLife) ...
i have used windows and linux as my desktop OS for more then a decade and i can tell, OS X is for the idiot !

yes, it is so easy to used that even my grandma know how to use it... (just a example ...

) i only spend less then a week on it and i think i have learn far more then spending a decade learning how to use windows...
application wise, due to the nature of OS X (darwin), open source apps available on the internet and just need you to google around to get it... for the activity you mentioned that you will be doing on the net, you will find not only a lot of options but finding which are more creatively suit your needs and eye (right, the cool graphics) ...
if budget is not a concern, get a mac... if you regret later the OS X is not for you (which i doubt so), just install boot camp and it is windows ready...