with Kinect style games, the input lag becomes noticeable. the st60 isn't terrible, but it's not quick by any stretch either.
for a budget, i'd be more inclined to stick with the s60. st60 would only really be worth it if you want the 3D, otherwise i'd say you have to move up to the vt60 to get the good picture quality and acceptable input lag.
do not buy an LED if you ever watch it with the lights off, just don't. this is what passed for 'solid black' on my Samsung d6300(returned two of them)
the clouding was clearly visible on all dark scenes under what I consider normal viewing conditions(no direct sunlight, room lighting 50% or under)
PS, 3-5hrs of gaming every other day is a lot... haha
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1018AH, 5.1 audio
Sources: HTPC(Mediabrowser), PS3, XBOX360, Wii, Sony DVP-CX995V
Control: Harmony One