Need help purchasing a laptop from $800-$1000 that can also do mid-range gaming

Just like the topic title says, I am looking for a laptop that can run most games on medium settings. I have been leaning to the Lenovo Ideapad Y580 ($950, http://shop.lenovo.com/SEUILibrary/controller/e/web/LenovoPortal/en_US/catalog.workflow:item.detail?GroupID=457&Code=59359513&category_id=AC523278A4F13F27A84F5F5622D1AC7A) but I am open to other laptop brands (such as Sager/Clevo on xoticpc.com). Any thoughts? I would prefer an I7 process but i5 will do if the graphics card is good (obviously discrete graphics is what I want). HD screen may or may not be needed and I do not care for SSD (which would be too expensive for this price range anyway).

Maybe you can take a look at xotic pc's FORCE 16F3. 

For about USD950 u get

3rd gen I7, 8 gig ram, gtx 670m, 500 gig hdd. OS Not included

About 10 pounds I think. full keyboard with numpad i think. no backlit keys tho

Lots of customization options if u want to spend more.

Just make sure you get at least a 17", all the power in the world is worthless on a crappy little 15" screen. Just my opinion. I made the mistake of taking better hardware over a larger screen and regret it. 

get the lenovo Y580. it is by far the best bang for your buck in a gaming laptop right now. i have yet to run into a game that i cant play on high.