Avoid plasma and go in for newer LCD models.
most of the major companies are phasing out plasma technology in favour of lcd (or its esoteric variants) since it is cheap to produce, maintain, and the process is more environment friendly. warranty and spare parts issues are bound to surface a year or so in the future in the case of plasma technology.
RE: Sansui
yes it is true Sansui is just a trade mark used by HK based trading co's mostly. The Golden age of Sansui was in the 1970's to early 1980's. during that time they were the best in audio equipment.
Their receivers / amps from that period of time still commands a premium in the audiophile market and speaking truly, their performance is still to be surpassed even with the advance in electronics in the last 25 years. The warmth, stage presence is lacking in most of the modern day equipments, i dont judge sound from specifications like THD, Frequency Response and other technical specifications.
Sadly Sansui could not cope up with the cut throat , price sensitive market conditions of the late 1980's - 1990's and had to close down.