Choosing A Laptop For Cubase 6!!!!!!

Hi y’all just a few questions here about a good choice for a laptop to use for Cubase 6 running it smoothly… real smoothly. :smiley:
I have my eye on a few laptops here I will link a few!
http://raincomputers.com/products/livebook/?ref=home Claims to be a Laptop made for audio production.
http://h10010.www1.hp.com/wwpc/ca/en/ho/WF04a/321957-321957-3329744-3995710-3995710.html?jumpid=re_r552_ca/hho/psg/volumeLead_prod_ref/landing/consumer_notebooks Some feedback on any of these 4 Hp envy would be nice…
http://www.a-power.com/product-19596-266-1 Any ideas why Toshiba is so much cheaper than other laptops? They seem quite solid though.

My price range is $1000-1500…
I would also be running Cubase 6 and Serato Itch with this… http://www.m-audio.com/products/en_us/ProFire610.html
Any feedback would be nice y’all thanks!