NME, I know what you mean, and yes, Turntables will always be the iconic system for the "DJ", but most of these guys are Mobile DJ's... you have to think, do I want to carry a 200lb coffin, or a 7lb laptop and a 3lb controller?
I personally roll with technology. There have been gigs where 1 or 2 guys would scoff that I was using Denon CDTT's rather than Technics or something, but they can kiss my ass when I can do the same as TT's with the flexability of CD's.
NOW... I use a Denon controller, and I can tell you that I wish I could have done this years ago. I went back to TT's shortly after Serato came out, but when I saw Denon make a controller like the 6000, I had to get on it.
Dude.
MIDI is the shiz-nittle-bang-snap-snap-snap. Imagine your perfect DJ setup.... any EFX you want, and sounds you want, any samples you want... the ability to mix with videos JUST like mixing with audio. Now picture being able to assign any of those in any way you want. A MIDI controller is like a blank slate. Sure, it has everything programmed into it... LOAD buttons, Skip buttons, Sync buttons... but the beauty is that you can CHANGE THEM to whatever you want them to be!
Like I said, I roll with technology, and I can say with certainty that this is the next step for DJs. It's already happening. It has no moving internal parts, so there is no decks to break down, it is light, and super compact. I rock 4 decks with my MC6000, and can do mashups and blendz on the fly instead of having to use premade ones like most people do.
The only problem I see for YOU personally is the small ass wheels. They take some getting used to for sure. I still can't scratch on them very well, but then again I never could scratch well on Pioneer CDJs either. My platter had to be moving like a TT, thats why I went with the denon CDTTs. But you get used to it, and the fader is sick. Cuts super nice, and has just the right amount of feedback. You may not be into it right away, but you should at least hit up your local spot and check one out.
Like I said, this is definitely the way DJing is going. The evolution is obvious. Mobile DJs have been using controllers for years, now the club DJ is catching up. It is no longer a Turntable vs CD event, it is now a Turntable vs CD vs Controller event.
I have said it before and I stand by it... CDJ's will be damn near gone within 2-5 years.