I'm thinking about getting a laptop soon for $700 or less and if its possible to get a better laptop to run Skyrim with then my current computer for that price, I'll do so. Oblivion runs great on my current computer, even with 200+ mods.
The total cost works out to be much cheaper if you build a new gaming desktop from components + buy a cheap non-gaming laptop.
gaming laptops are generally significantly more expensive and are never going to be as powerful as the high end desktops.
If you must buy a gaming laptop for portability reasons, I'd suggest taking a look at some of the models on http://www.xoticpc.com to get an idea of the pricing. Ideally you would want to go with something with display resolution at least 1600x900 or 1920x1080 and a 1 GB DX11 video card, either NVIDIA 460M or AMD 5830M (or better). The Sagers are a little bit better value (as in lower pricing), but most of them are pretty bulky and not convenient to carry around with you everywhere.