Reply to Buying New Kit: Could use some feedback/experiences with the following...

Hey guys,

I'm getting myself some gear for DJing with Ableton Live and I could use some feedback from anybody that has used/is using the following or knows someone who has a friend that knows a friend that uses it:

Namba Gear Big Namba Backpack
Presonus Audiobox USB
Akai APC 40
Sony MDR 7506

Those are what I plan to use for my DJ/Production set-up with Ableton Live. Any alternatives/suggestions are welcome. If you can figure out a cheaper but equal quality route let me know. My budget is $400-600. Fire away.

-Marc.Elektro