Any of the brand name laptops should be fine, Dell, HP, Acer, etc. Depending on where you will be travelling or working, opting for a cheaper, less desirable model might be a good choice. Most computers are pretty reliable from an electrical point of view if treated with a bit of care and consideration, so really it is only worth paying for the features you need. Ruggedised laptops are too heavy and expensive. Much better to go with a cheaper option and spend a bit on a decent padded carrying case. It really is possible to do everything on one of the larger screen mobile phones too, in case you really want to travel light.