Get a labtop. Get a aluminum case, but you got to be careful because a lot of cases or very poorly made and won't stand up to much beating like being takin back and forth from different places. But like I said get a aluminum case.
If you want a very nice aluminum case, get a lian li. They make beautiful aluminum cases that are light and fit togeather perfectly. They are fairly expensive but i have the 65-B and I love it, the whole thing flows perfectly and fits togeather flawlessly, they definately know whats up. Plus its aluminum so it weighs only a little more with everything in it than my other case did on its own.