I chose intake cause it was cheaper... but I'm most happy with the change in acceleration I noticed after installing my exhaust. I didn't need that much more power, just a lil more oomph to help me feel safer about punching it to get into the carpool lane in the morning--and I got it. My butt dyno's is as happy as it's ever been!
Added bonus--my car sounds awesome off the line, at speed, passing, and when learning how to do donuts. ^_^