Well, I think you're on the right track with the budget, latest and greatest will run you that much.
As far as what to buy, I'd recommend you look into Sager/Clevo, Asus and MSI gaming laptops at first. If none of those meet your taste for looks, you can stoop down to Dell Alienware, HP Envy, Toshiba Qosmio, Samsung.
You didn't mention where you live, so I'll assume USA.
A good starting place would be this website:
www.xoticpc.com - they sell Asus, Sager and MSI laptops for very good prices
You can also take a look at similar websites:
- OriginPC.com
- Digitalstormonline.com
- Falcon Northwest (www.falcon-nw.com)
- Maingear.com
If you're outside US, Clevo reps in europe are EUROcom, but they have a lot of different things on their website as well.
As far as specs, get the best GPU + CPU you can afford on that budget. At least 8gb of ram, you don't need more for gaming but if it's your fancy you can get more in most cases. Harddrive is obviously up to you, I'd recommend getting an SSD with the laptop, it's far superior to an HDD in a laptop application in terms of speed. WiFi, make sure the adapter supports 802.11g/n (ac if possible, but it's not widespread yet).
There are some laptops that offer desktop parts in them, those are nice, but I don't believe your budget will afford you those (they are also very large laptops that tend to be very heavy and power hungry). Lastly, do consider where the laptop vents are with respect to how you're planning to use the machine. Gaming laptops tend to get pretty hot, even with dual fan cooling setups, so if you plan to be using it on your lap for most of your gaming sessions, look into getting a laptop cooling pad that would fit the size.
That's about all I can give you in general terms. If you find something that you have questions about or pick something out and want an opinion on it, come back and post a reply here.