Cool. I like bigger screens too, but I limit myself to 17" Windows laptops. I'm often tempted to grab a used late 2011 17" MacBook Pro (last ones they made) - but they all have the graphics overheating problem.
It looks like you have the keyboard hard mounted or in some kind of a case, yes?
I was gonna... I bought an iMac to use with my small system. It's a nice computer, but it has no VESA mount, and the stand is not easily removed. So I bought a Dell AIO PC... 23.5 inches, and I LOVE it. My Large System had two rack mounted computers, each with a 22" monitor. The new version I'm working on will use those same monitors. I like the large screens. It would be hard to go back to something 17" or smaller. The iMac is now in my office.
I never have my mics anything but flat anyway. The Senn's have some processing built in and if I need it, I will do it there.
I mounted the mixer during lunch and setup some gear and it works quite well. Everything works as it should and the sound seems the same, except for the mics, which sound great. (not forced, if that makes any sense).
Well, I could dispute and debate your claims but you are entitled to your opinion. It is absolutely LAUGHABLE that you say a huge screen takes away from actually dj'ing... because the screen you use has so much to do with being a dj... We used to not even USE screens, my friend. Again, laughable!!! Talk to me when you have been doing this for 28 years.
We've had this debate before... Nothing wrong with laptops; they're just not necessarily for everyone. There's no doubt the laptop is easy to hook up, but not that much easier than an All-In-One computer with a wireless keyboard and mouse (like the iMac or my Dell AIO). The back of a laptop DOES look cleaner than the back of a computer or monitor, but there are drawbacks with laptops that make them less desirable for me. First, the screen is small, and if you have it mounted behind your controller, it looks pretty small from that distance. The size of the screen has absolutely NO impact on DJing, but it sure is nice when searching your library for music. Once I load a track, I hardly even look at the screen... I use the controls on my controller. Secondly, having to reach across your controller (and other gear mounted in the top of a rack) to use the keyboard on the laptop is uncomfortable. And the mice on laptops???... They suck! I always use an external mouse with my laptops anyway. Yes... my dual 22" monitor setup looks odd compared to what other DJ's use, but I don't really care.
As it should be - they (the Denon 4000's) are self-powered controllers with XLR balanced outputs. The real stinkers are USB only powered controllers with unbalanced outputs, especially if you have a long run to the speakers. IMHO, those benefit the most from adding a small quality mixer into the signal path, and they'll usually have better mic pre-amps as well.