You can get some really good deals with Sager:
http://www.powernotebooks.com/Sager-Custom-Built-Gaming-Laptops-Notebooks-cat-26.html
Because of the wide customization array and availability of the lowest to the highest end parts, Sagers can be pretty affordable and offer exactly what the user needs, usually leading to a lower price. MSI and Asus are great quality wise, but they usually keep the base models equipped with a few expensive parts without allowing the buyer to say, "no, I'd have no need for that."
A great example is the ASUS G75VW-DS73-3D, which has a base configuration with two 750GB hard drives. Sager's 17" NP9170 has a base with only one 500GB model, thus cheaper, but you can change it to 750GB and ADD another 750GB drive if you actually want to pay for it. The Asus also has a base of 12GB RAM, while the Sager 17" has a base of 8GB, also cheaper, with more room for flexibility.
I tried out the Asus build, ASUS G75VW-DS73-3D, and then compared with the Sager NP9170 configured to have all that the Asus had. In the end, the Asus was $1996.26, while the Sager with the same parts was $1740.18. Sager is high quality, but cheaper. I imagine they save money by not advertising much.
The NP9150+Windows 7 is $1357, and it has a GTX 670M as stock
http://www.powernotebooks.com/configure.php?special=1229
The NP9130 is cheaper, and if you are going to go with the GTX 670M, buy the NP9130. If you want a more powerful GPU, get the NP9150, but any upgrade on the NP9150 would put you over $1400.