Well do not listen to Shakil at first!!
If you want your OWN styles, and no styles that are on board (like me, I dont need Big Band, Salsa, Swing etc etc) you should not buy a PA-80 because that instrument has NOT been designed for you to make your own styles. Same for the KN6000 ! Do not buy the KN-6000 if you want own styles !!! Those instrument are designed so that you will use the on board styles the most. Any additonal styles YOU create cannot sufficiently be stored on board. The KN-6000 has very few user styles memory so you need to save on DISK! This counts for most arrangers in that league, especially for those with a speaker in it. I would therefore recommend the EM-2000 for your needs as regarding to style saving (direct from ZIP). But the Roland has not got good drums for techno. Then I think there is only one arranger left which is created for you to make your own styles with good techno drum kits: the Korg i30 !!

Ilija