can anyone recommend a mac alternative?

Just a short space of opportunity for anyone to recommend a decent mac alternative… (the "Any hope for us Mac guys?" thread has made it clear that this won’t be taking any business away from Leif, and so I hope I’m not stepping on any toes here; if so, deletion is immanent =)

I like to listen to pandora/slacker type radio, so just an itunes one isn’t makin’ the grade over here (unless there’s a way to run this kind of browser radio through itunes?)…

thanks in advance!