Here’s a quote from Cnet Editors review of this TV:

“PC performance: We also tested the Sony's VGA input and the results were disappointing. We set our PC to 1,920x1,080 and unlike the 60A2000 we reviewed, the R60XBR2 did display an image--but it was far from ideal. We could find no way to get the image to fill the screen completely; there was a black border about 8-inches wide on all sides, which is unacceptable. We were able to reduce interference by playing with the pitch and phase controls, but never completely eliminate it.

The Sony fared much better as a PC monitor when connected via HDMI. It filled the screen and resolved every line of a 1,920x1,080 source, according to DisplayMate, and text was relatively crisp. The image was overscanned significantly, however, so the task bar at the bottom of our Windows XP desktop, for example, was completely obscured along with one column of icons on the right side. According to DisplayMate, overscan measured 3 percent on the top and bottom and 2.5 percent on the sides--and we couldn't do anything with the Sony's controls to improve that. Of course, depending on the drivers in your video card, you should be able to correct the overscan at the expense of re-scaling the image.”

http://reviews.cnet.com/projection-tvs/sony-kds-r60xbr2/4505-6484_7-31901228.html

One of the reasons for the overscan is that this is a RP set. Because this set displays an image that is reflected off of a mirror Sony, and all manufacturers that make this kind of set, design them with overscan. This give them some leeway when it comes to the final mechanical calibration of the set. You can imagine how difficult it would be to build these sets with zero overscan and perfect alignment. In other words, the light engine is producing an image that is 1920X1080 but a portion of this image is outside of the viewing area of your screen.

As this is a Sony RP set I would be very surprised of you could not find the solution to the overscan issue. You may be able to display an acceptable picture by just using Powerstrip and using a non-standard resolution.