Has anyone made a direct comparison of image quality between the Sony 46WT510 and 51WS510 from about 11 feet? I am returning my 46 to Best Buy (unhappy with customer support) and ordering a new unit from OneCall. Can get the 51 for $100 less than I paid for the 46, but want to be certain of relative image quality. I was extremely happy with the 46 image at 11 feet. Also, does the 51 have same size CRT's as the 46, or are they larger?