I can't give any info on that ROG backpack, since I haven't bought it, I went with the Targus 17" XL backpack from the Targus website. Just got mine Friday, but it's definitely large enough for my laptop, fan, books, plus probably another 1 or 2 G74SX's. It's listed as like $80 on the site, but there's a quick survey and you get a discount, so for me it was like $60 with free shipping. Here's the link if you're interested or just wanna take a look
http://www.targus.com/us/productdetail.aspx?regionId=7&sku=TXL617&PageName=Backpacks%20for%20Laptops...
Sager NP9370
256GB Samsung 840 Pro SSD + 750GB 7200RPM Secondary HDD
nVidia GeForce GTX 680M 4GB VRAM
Intel Core i7-3630QM 2.40GHz
16GB RAM
Mouse: MadCatz R.A.T. 7
Keyboard: Razer Lycosa Mirror
Additional Monitors: 24" 1080p Insignia LED/LCD TV and 21" Acer LCD Monitor
Windows 7 Ultimate