there's a lot of 'ifs' in this debate, but I agree with the above. if I didn't care about money, or size, I would take the oled over the plasma because I'm all about the deep blacks, and to this day I still miss my CRT RPTV because of that.
but realistically, I would never buy the LG right now. 1400 is a lot of 'extra' money, and 9" is a lot less screen area. I would justify this to myself by saying that 3yrs from now, I would rather have the f8500 in the living room, and a great OLED tv in the theater. and if I bought the LG right now, I might have to wait 4yrs, or buy a lesser quality oled, and I'd still be left with a questionable auxillary display in the living room(in the living room setting I think the f8500 would actually be better).
then again, if you don't NEED a new tv right now, I think it'd be even better just to wait for a oled that don't have second thoughts about. maybe next year we'll see a 65" model for a reasonable price. or a UHD model that'll make you glad you didn't waste money on a 1080p one. I don't know, I just don't like buying expensive products that I have second thoughts about.
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One