Here are the panel codes per Samsung's own parts site: H7150: 46=TS01, 55= TS01, 60= HH01, 65=TH01, 75=TS01. H6400: 40=unknown, 48=TS01, 50=AS01, 55=TS01,US02, 60=HD01, 65=MD01. H6350: 32=TS01, 40=TS01, 48=TS01, 50AH01, 55=TH01,UH02, 60=HS01, 65=AH01, 75=TH01. H5500: 32=TS01, 40=TS01, 48=TS01, 50=WH01.
Hope this helps prospective buyers. One change from last year is that other than the 60" Sharp, only Samsung panels are being placed in the H7150 line. Also curious is that the 5500 series only has Samsung panels. It makes sense, given that I heard David K say that the 5 and 8 series were very solid but the middle lines were a mixed bag.
Just remember A or M = AU Optronics, T, U, or W = Samsung, and H = Sharp.