i didn't fully switch over to a mac user (iPhone 3---> Macbook Air); majority of my time is still spend on the computer in my spec which i prefer over my Air. As for sites that really helped with information through the transition Macrumors rank at the top.
just upgraded from a q6600 to a 4770k.
(2) 2gb pc3-1600
hd3870 *i know the video card is old
Samsung 840 Pro 128gb
compared to my q6600 its night and day and only need to upgrade my ram and cpu fan.