If you're a "Budget" guy, don't even bother looking for a gaming laptop, the battery life of them is terrible when gaming and they don't compare to desktop ones when you consider the price...
Gaming hardware can come cheap, if you know what to look for.
If it's space you need to save, build a M-ITX gaming rig, they can come in VERY small form factors...
But if you're set on a gaming laptop and don't mind the extra on the price. The MSI GP-70 or GE-60 are the best options for a budget gaming laptop...