I might grab an Apple TV along with my new macpro, but only have a "B" wireless router...all my office pc's are close enough to wire together. I see I can get a nice Linksys "G"/"N" for around a $100, but do I really need it? Will I be able to stream converted xvid and divx tv shows and music with a "B"? What about these Gigabit routers I see, any advantage there, or would an "N" be good enough? Thanks guys!