If you want to have everything you have on your computer available on your phone, etc, then go Apple. The Macbook Pro is a great machine that offers long battery life and is fairly user friendly. The down side is Apple prevents a lot of kool apps from being used on their products.
Personally DW has a Ipad and Iphone, and I hate them to death. But their hers not mine. I am more comfortable with my Android phone and will be getting a Android tablet soon. That will go along with my Win7 laptop. And this to me is much easier to use. But as always it is what you get used to.
What do you use the computer for? Simple bill paying, emailing and surfing the web? Then a good tablet might be a better choice for you. If your heavy typing blogs, reports and such then a laptop is much better. You really really need to decide what, desk top, laptop, tablet, smart phone will work for your needs and be easiest to use. Then go shopping.
ATT is OK near big cities and on the freeways, but if you travel to lots of remote places don't expect service. Verizon still offers better service in remote areas.