Reply to Laptop Help!!

Hey guys, I posted here before about laptops and it helped me a ton, so I'm going to try for some more advice!
I'm looking to get a good laptop for a few different things. I need it for DJing (I use Traktor), Music Production (Ableton, other various software and plugins) Art (Photoshop, Maya) and gaming (It needs to be able to run powerful games with good graphics).
Heres what Ive narrowed it down to, I like these for the graphics card and the i7, but I'm skeptical about the sound card on some of them. Im really leaning towards the Lenovo or the Asus but its really up in the air right now between these.
http://www.shopping.hp.com/webapp/sh...fig_id=7734896

http://www.google.com/shopping/produ...&ved=0CI4BEMwD

http://www.lenovo.com/products/us/la...y-series/y580/

http://www.dell.com/us/p/inspiron-17r-se-7720/pd

Any help is really appreciated! Thanks