i've never seen the elite in person, it's supposedly is one of the best lcd's ever made, and up there with the best tv's ever made. but i would still say that it's a gamble. if you are at all sensitive to uniformity issues, the elite may still present some haloing and other backlight issues.
the st60 is a phenomenal tv, and the only way to get significantly blacker is to go oled.
ideally, you should bring some demo material and view both tv's, but if that's not an option, i would go with what i KNOW to be good, and get the st60. i've tried other lcd's that were highly rated, and i always found issues with uniformity that ruined the experience for me
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One