-I was given $750 to spend from insurance
At about that price range, would probably opt for a 50" Pan S30.
If like 3D, might opt for same size in the ST30, or consider a Samsung.
If, and only IF, pricing differential was Favorable, would consider a Samsung 50" "720p" set. These still offer 1366x768 resolution, unlike the 720p Panasonics, which have moved to only 1024x768 in the 50" size.
At 42", 1024x768 is Acceptable. At 50", the SDE becomes obvious at 1024x768, and at appreciably farther distance than on a 1366x768 set.
FWIW, we own 3 Pan Plasmas: 42" 1024x768, 50" 1366x768, and a new 60" 1080p set... Numerous Pan Plasmas in family - but for past 2 years have recommended Samsung 50" 720p sets over the 720p Panasonics.