HP is better than Gateway. I have been using HP products for the best part of the last 5 years both at home and work. I have used Laptops, Desktops, Workstations and Servers form HP and very very happy with all of them. HP always offer great products and good prices and have an excelent customer service.
We have just upgraded all our IT equip at work for HP and as I type this message, I am typing it on a brand new HP desktop which I am very pleased with. HP also run some great offers, such as 'Trade-In' offers (business customers only I thnk) and we were able to trade in all of our old computers and get £150 for each one and they were only worth about £50.
HP all the way, Gateway are just not that well known compared with HP. HP sponser things like Formual 1. When have you ever seen sponserhip coming from Gateway!