How much is too much?

Like Rizki said, go with the Mac. 90% of the “advantages” you mentioned for the gaming laptops are not worth a dime for audio purposes. Built-in soundcard is rubbish, you use the one in your controller. Three monitors supported? Who needs more than one (and more than a 15″ at that – my eyes are bad, but I think a 17″ is just too much hardware between me and the crowd). 1TB harddrive? If you have more than 2000 or so tracks in your collection you should start to rethink your strategy. But unless you want to have evertything in WAV format and let’s say you want to have 10k tracks (which isn’t really helpful DJ-ing but just for arguments sake), it’s still only a 400GB load.

I’d get a new retina Macbook Pro (15″ is largest option I think) with an i7 CPU (i5 would do but don’t think they sell that in the 15″ retina one). It comes with a 512GB SSD and 16GB of memory. You’d stay below 3000 I think and they will hold their value better than any windows PC.

Seperate soundcard is not necessary anymore as Rizki states. Even if you want to do DVS, there is a fair amount of controllers that provide that now.

The right order of making a choice is determine what kind of DJ you are/want to be, figure out what workflow you (think you) have, pick the right software (Traktor, Serato, Virtual DJ or Mixvibes Cross – or any of a number of far smaller programs) and THEN find out what controller will support your workflow and software best within the budget you set for yourself.

For a beginner, good luck for getting the laptop paid itself back. Not to mention everything else…

My Macbook air was effectively 600 € 😛

Yeah Chuck, thats why i was wonderin what kind of Mac hes talkin about that worth $3,000 ???

Even a Macbook Air should be sufficient to feed his needs, which the OP stated at the beginner level

I still love their Dragon Edition one and on there, I can get a fully maxed out one: 1TB HDD, 4 128Gb SSD’s, 32Gb of DDR Memory, i5 processor, DVD/CDRW optical drive, 5 USB ports, a Steel Series Siberia Headset, a backpack for carrying it,

1TB HDD –> Just Chuck mentioned eh you dont need that much, there is always an external HD
4 128Gb SSD’s –> really four of them ??
32Gb of DDR Memory —> dont need this much to run a DJ software, its not adobe photoshop
i5 processor –> now this you may need to upped it maybe to i7
5 USB ports –> 2 is sufficient enough to run a DJ controller, too much !
a Steel Series Siberia Headset —> and why in the world you need this headset ? you need a real DJ headset, not some CS headset
a backpack for carrying it —> you prolly still need to buy another baackpack for your controller, cuz i magined laptop+controller wont fit in this backpack

Seems to me you building more to a gaming rig, remembered it be much safer to focus your laptop for one ultimate purpose