coming from a desktop user, the only real advantage of a laptop is the mobility. if you can do without the portability, get a desktop. it will be cheaper and likely more powerful, plus you will get a bigger screen and hard drive.
i had a (windows) laptop and when it came time for a new computer, i chose a desktop as i never used the advantage of portability in my old laptop. but hey, everyone has different needs so for you it may make sense to get a laptop.