You can start http://www.gamesas.com/topic/1472493-unofficial-will-my-pc-run-skyrim-thread-63/ and read the OP for what to know on a good system to run Skyrim on. Of course, you can ask too
I would advise against a laptop, as they are not really designed for gaming (no matter what the description of it says)
a Desktop will be much cheaper, will last you much longer, and you will be able to upgrade it if you so wish (you can't really upgrade a laptop other than throwing in a new HDD or replace a RAM stick)