When you are dealing with a name like Sony, you know that you will pay a premium for the brand. Sony offers a wide variety of notebooks and other computers that are broken into machines for the consumer and machines for the business users. Today I am going to take a look at one of the machines for the business users out there.The notebook on my test bench today is the Sony VAIO VPCZ125GX ultraportable. This machine is small and is physically only a bit larger than some of the big 12.1-inch netbooks I have tested recently. The main difference between the Sony VAIO VPCZ125GX and the netbooks that are close to its size is under the hood.The Sony VAIO VPCZ125GX may be small, but this notebook packs in some serious hardware and carries a big price tag to match. This is the sort of machine that a busy business executive would want to pull out for a meeting. It looks good, has oodles of performance and is expensive. The real question is whether the rig is worth its lofty price tag.