Torrent
 

I am a noob and am about to make a switch to gutsy, but I am interested what
p2p client in GNU/Linux is the best. I know people have different flavors so I am interested in a lightweight, low CPU usage, a client where you can choose which files to download, something like uTorrent which I am currently using. I have read somewhere that Transmission is similar to uTorrent, but I want your help. Thanks.

I am a fan of ktorrent. It may not be light weight enough though. There are lots of choices. If you go into adept just search for torrent.