Im currently running a 2 year old acer, with an INtel HD card and WoW, Rift, D3 all run on the lowest possible graphics settings and still only run 1-4 fps. So what I am saying is, its crap! I am looking at getting a new system and am kinda new to everything in terms of requirements and whats good and what not. But here is what i've built.
HP Pavilion dv6t-7000 Entertainment Notebook PC
Windows 7 Home Premium 64-bit
3rd generation Intel(R) Core(TM) i5-3210M Processor (2.5 GHz with Turbo Boost up to 3.1 GHz)
NVIDIA(R) GeForce(R) GT 650M Graphics with 2GB GDDR 5 video memory
8GB DDR3 System Memory (2 Dimm)
FREE Upgrade to 640GB 5400RPM Hard Drive
NO mSSD Hard Drive Acceleration Cache
Microsoft(R) Office Starter: reduced-functionality Word/Excel(R) only, No PowerPoint(R)/Outlook(R)
No additional security software
6 Cell Lithium Ion Battery
15.6-inch diagonal HD BrightView LED-backlit Display (1366x768)
SuperMulti 8X DVD+/-R/RW with Double Layer Support
HP TrueVision HD Webcam
Backlit Keyboard with numeric keypad
Basically took their almost cheapest laptop and upgraded the guts a bit. So would this be substantial to run high or even ultra settings on those games listed above with no lag? My cap for a price is $850. That computer is 774.99. But if you have better ideas for a great gaming that stays within my price range, let me know that would be great!!!
Intel Core i5 3210M(2.50GHz), 3MB L3 Cache, 3.1 GHz Turbo
NVIDIA GeForce GT 635M with 2GB Video Ram
(The ram is on the low side. But it's a steal for 550 bucks. You could always upgrade the ram to 8gb if you wanted.)
Those what I recommend for a budget laptop of your pricetag. There are some better i7's for up to and over 800$, but the tax, and maybe shipping if there is any, will still get you. For a budget those 2 laptops look awesome. I personally like the 550$ one, because it's cheap. You can always find a better laptop if you raise the bar, but then where do you stop? A lot of people fall into the pitfall of buying the better laptop, only 50-100$ more for this awesome extra part! Then they see an even better one for only 50-100$ more than that one.
It's similar to your version, but it uses an i7 instead. It's also 1600x900 17.3", so you're paying a bit extra for the higher res and bigger dimensions I imagine. But for 850$+ tax it's definitely going over your budget.