Reply to Laptop questions!!

So I'm getting a new laptop (Mine is a piece of crap).
I currently use Traktor Kontrols s4 with Traktor Pro 2, and will probably stay with Traktor for the end of time of course.
Anyways, I am unfortunately not made up of money and I don't wanna get a laptop that will have latency like my current computer.
Now I've looked at system requirements my computer has them but I have really slow ram. So I get tones of audio dropouts.

Here are a couple of laptops I had in mind, Please if you know anything take a quick glance at some of these computers and tell me if I would have any problems with those computers, Or recommend your computer if it works good
Keep in mind I'm trying to stay below 700 haha

http://us.acer.com/ac/en/US/content/model/LX.PTG02.170

http://www.walmart.com/ip/Acer-AS774...ndingMethod=rr