I have an Asus laptop and love it.
I installed a SSD and changed the wifi card. With the wifi card you have to keep in mind how many antennas does it need. My laptop only had 2 antennas, I had to add the third. Getting the lid apart to add the third was a pita, so I installed the antenna under the palmrest.
If your buying a laptop get the 15" you already have a tablet. You also really need to question yourself if you need an i7 in a laptop.