Cost and Sager comparison for AW 15 or 17?

I have spent a long time looking at Sager models, mostly because of price. But since the build I am looking at will be around $2000, I began to wonder if Alienware can compete. I really don't know much about Alienware, nor have I followed pricing. So, here is what I am looking at on the Sager side:

17.3" display
i7-4700mq
780m (Single card, with maybe an option to sli, not sure about sli since I may never add a second card)
1TB 7200rpm hdd
16gb ram
blu-ray driver, maybe burner
Windows 8

These units can support two 9mm SATA, two mSATA, and you can put a drive in the optical bay. (If a 15" can do that, then that is ok)
Standard warranty is one year, send it back.
Noise seems to get as high as 53dba (This concerns me)
Easy to upgrade or work on.
Weight is about 8-9 pounds (heavy)
Size: 16.3x11.26x1.81 (bulky)

Specifically I am looking at the NP8275-S (no sli support) or NP9380 3D (sli and 3D/120hz display support, but would start with single card)

So, how much would a similar build from Alienware cost me approximately? What are some pros and cons between these? And review comparisons? Which model(s) should I look at?

I appreciate any advice or assistance on this decision as I hope to buy a laptop around black friday.