Sadly I'm not running OS X on my i7 at the moment due to hardware issues, but here's my display setup (pic attached). 24" ViewSonic > 40" Toshiba HDTV < 24" AOC. I really want to have the two 24" displays conventionally next to each other, and then have the 40" HDTV on a pivoting arm above it all. Soon I hope.
EDIT: Ignore the messy desk and uneaten burger. lol.
EDIT 2: I decided to setup 3 displays because I did have my two 24" setup directly next to each other, but I had my 40" HDTV to my right and behind me. I occasionally stream my PS4 games on Twitch and having to 180 spin each time I wanted to check a chat comment etc was getting stupid, and I wanted to see what it'd look like having 3 displays running on my system. My use case though is generally general use (web browsing, movie/anime watching, chatting etc) and it's nice to have a random app's window on any of the three available displays at any given moment.