Most definitely, forget the Fuel Pak and go with a real tune. There are lots of used Fuel Paks for sale on the internet, for a very good reason. Apply the money to a real tune using a full featured system. There is a lot of info on the TTS, Power Vision, SEPST, and similar flash tuning systems on the site, but I like to recommend that you first find a full time professional tuner with excellent credentials to do the tuning, then ask him for his recommendation on which device and system to use. It's a tool, and the guy using the tool would be the logical choice to help decide which tool to use.
As for the cam and other engine mods, you will need to define what your goals are to get the best answers. Just adding a little "umph" doesn't tell us much. Are you looking for better midrange and top end, better low end pulling power, how do you normally ride (one up and kind of sporty, two up, two up and loaded to the gills), etc.
Jerry