Both Dell and HP are notorious for having a ton of unnecessary and even severely performance-reducing software preinstalled on their computers. This is much better on their business line. Yes, there's still a lot of extras, but no all the advertising BS and games that end up overtaking the computer and making it run like a three year old netbook.
I can't tell you how many customers I have gone in to talk with you just thought they could buy any computer they wanted and it would be what they need for their business. Come to find out they spent several thousands of dollars on systems that will not fit their need and are way overpriced for the junk that they got. The biggest advice I can give you or any customer of mine is to talk with an expert. As I've said, you can save yourself a ton of money and headache contacting someone to have it done right the first time than having to do it over!