Is Vizio more comparable to something like a RCA/Sansui or a LG/Panasonic/Toshiba/etc?
Somewhere in between LG and Toshiba in my opinion. Last time I researched this is when we bought 42" and 47" tvs about 2 years ago (the non-internet version of this set). Most of their components were manufactured by LG under contract using a Vizio design. I took the back off one to take a look at an intermittent audio problem (once in awhile component outputs didn't work in surround) and saw the names LG and Sanyo on the two boards.