The OP did say crunchbang (
http://crunchbang.org/ ). It is a fairly barebones linux distribution but one that has a bit of a fanbase as it leans towards something like arch linux where you pretty much sort everything from the ground up but actually comes with enough stuff out of the box to be useful but still keeping very lightweight. For the sake of completeness I should say don't confuse it with the similarly named ArchBang linux, which does much the same (even uses the same window manager) but leans even further towards Arch linux's ideas and philosophies.
Anyway I probably should have also asked some questions. I assumed the OP just wanted something to go on the internet with and maybe use as a light file share (basically everything a desktop PC can commonly be expected to do). I am not sure the wireless AC standard is the way right now so "pretty much any hacker grade wireless N compatible wireless card" would have been it.