Take a look at the Asus higher end laptops which some people in my class use, we do 3d animation; different programs but we end up rendering out and needing the higher end specs to be able to function in our program and if you edit HD videos then from experience I know you would want that in a laptop. Good link for laptops:
Best Notebook For Animation of 2012 Dell and Asus are most recommend, I'm not a big fan of HP and most certainly do not pick any Alienware machines; they are too pricey, make so much noise when you do things it is like working with a jetpack and could be as heavy as a jetpack as well. I know that with Asus you can get a practically good machine that can support the majority of your work for around and maybe even just under $1000. I'll have to ask what laptop my friend uses cause I am sure it is under 1.5k What kind of compatibility problems are you having? Program wise? Overall Macs are very good for video editing.