It depends on what the application needs. Hardware and brands are interchangeable at this point, if they all can run it. Am I right?

If I'd have the money, I'd buy IBM. They're at the brink of new discoveries all the time, and their machines run as a charm. But it's your call.

DELL is best one as compared to others

IT professionals are looking to transition to the new style of IT computing. As per my experience, Dell's technology has a long way to go. The support has been far better with Dell than HP. If you want to know more join the innovation workshop series, executive sessions hosted at the Dell Solution Center in Santa Clara, California

IBM is best server provider company.