I just had my 50a2000 sxrd sony calibrated by Chad B. ( http://www.hdtvbychadb.com/ ) Chad arrived right on time and got right to work. He did an excellent job at calibrating the 3 inputs used for the set top box, toshiba hd-20 hdmi input, and component input for the xbox 360. He was extremely thorough taking his time to dial in the greyscale, geometry, convergence...etc... He also made recommendations on how to rework my cables/inputs for improvements. He also improved the contrast ratio. I will post the results of the calibration once Chad sends me the file via email.
Being the videophile that I am, I noticed a very nice improvement in the quality of the image. I would recommend Chad B for all of your calibration needs.