Originally Posted by bombastinator
Not very fond of ac myself. I prefer a/b/g/n. More options. If all you want is A, what you might want to be looking for is an old pci a/b card. The older cards were often quite powerful. particularly the old apple cards. if you can get a driver for one. I'm quite fond of A myself. It's not very fast, but still faster than most broadband, and practically no one uses it, so the channels are usually clear.
this ^ is also a good option depending on what your using it for i should have asked what you plan to use it for i guess
i have duel band wireless A+G adapter that is wireless A 5ghz and wireless G 2.4ghz which i consider to be more then enough for what i use it for but if you are streaming hd video or games over your network it is good to have something with a little more speed most people wont even need wireless N or AC unless they have some really faster Internet or are stream HD video