Toshiba is pretty good, I've heard great things about their Qosmio. They have another model with an i7 in it, but that's getting pretty expensive and really, most gamers won't notice much of a difference.
My friend has one of the ASUS Republic of Gamers laptop.. It's pretty nice, except the screen is only 1600x900 resolution. I'd recommend it. Or a Sager. I'm totally unsure of the quality, but the performance for the price is nice.
2600k • 16GB RAM • 120GB SSD • 4TB HDD • GTX 1080
15" Retina MBP || 64GB Nexus 6P || 64GB iPad Air 2
Steel Band Huawei Watch || Sony RX100 IV Camera Battle.net: iFargle #1561 || Steam/Origin: iFargle