Pio does have midi controllers out with the new CDJ-400 and MEP rack unit. These units are superior to the denon units and much more reliable then all the problems the denons had initially. Pioneer might have taken their time o do it, but it was worth the wait they did it right. Pioneer will always be the top of the line name in DJ gear.
I use the DVJ-1000s and DJM-909 when I gig. I also use Serato. Pioneer is reliable and I know that my decks aren't going to fail on me, I can't say the same for other units. I have had every other deck/harddrive unit/computer I've used fail on me at least once. My DVJs are always there, rock solid. They let me do everything I want and have transformed the way i spin.