|They all have speed. They all have drive. They all have ram.|
Define your needs. What is your budget? What is your intended use? Do you want future upgrade ability ? Do you need portability? Do you want/need technical support? Are you capable of building your own system? Are you looking to run the latest games on high res?
Start there and then look for systems that meet your requirements.
Goin' Fishin' (Some day)