I agree that you will need to test-type on a number of different laptops to find the one that fits your typing style. I'm guessing you are a fast-typing hard-hitting touch-typist. Go to a store that has several machines out & open for inspection and type the same text on each, let your ears be your guide.
Also, I don't believe laptops should be bought sight-unseen. Get yourself somewhere where you can take a test-drive, you don't necessarily have to buy it there.
Tony
"Buy what you like, or you'll be forced to like what you buy"...me