Yamaha DTXpress/DTXplorer/DTXtreme

Hey there. Im a new drummer, and i play bagpipes and guitar in a 
celtic band. We really want to add drums to it, so natually for the 
sake of our ears, and our usually background music gigs, we were 
thinking about some electric drums. I was just wondering, if you 
bought it from www.musiciansfriend.com or some place like that, is 
there anything else i need to buy? Also, can you plug it into an amp 
using the standard cords used for electric guitars? Any comments 
would be much appreciated. -Will-