Manufacturer rarely has any bearing on performance. It's what's inside that decides that.
That being said, if you want to run NL2 fairly well with few issues you're going to need the following:
RAM: 6 GB minimum
CPU: 2.4 - 2.5 GHz minimum
HDD/SSD - Do I really need to explain how much space you're going to need?
GPU - Ideally something dedicated
With all that said, something like this would do the job for you inside of your price range.
http://www.newegg.com/Product/Product.a ... 6834317538