I have 3 HDTV's, CRT, LCD & SXRD. The only one that looks bad is the LCD (3yrs old) but only with standard definition channels. BB uses direct tv & they use more compression then dishnetwork, causing more artifacting. Some store just stick-up an anntena outside.
Next time look at the BluRay demo.
Most tv's in the store are set on a demo mode, like sony has 'Vivid' set as defalt. This make the tv look supper brite in the store but adds artifacting because lots of the inhasment software is turned on, making the tv have to do more work to inpress people.
The bigger you go the more you will see flows in the film.
I was looking at HDTVs at bestbuy and almost all of them i could see jaggys in lines and on the snowpeaks of skying i could see artifacts in the snow.Sure the colors are more vivid and lifelike but i could see stuff on them that i dont see with my 200 dollar analog.