Adding bluetooth to a mac pro (USB vs internal).

I need to upgrade a Mac Pro with bluetooth, in order to use the apple wireless keyboard and trackpad with it.

I feel it would be simplest to just plug a USB thing in the back that provides bluetooth. Can anyone recommend the best one to get?

Or, if putting the bluetooth card inside is better for any reason, can you recommend where to go about getting that?

Fast replies would be appreciated!

Thanks!

 

This would be good, right? http://www.ebay.com/itm/Apple-Inter...ltDomain_0&hash=item1e5e1819b8#ht_2083wt_1398

I bought his airport card last week, and it worked great in the mac pro.

edit: Okay, I've purchased this. Sorry. Close thread please.