I'm in the exact same position, limited to 50-51 inches. Seems like the 2 main choices are the st60 and the f8500. Sounds like in a dark environment that it's close to being a toss up. Regarding a daylight environment, just how much of an edge does the f8500 have? Enough to justify spending twice as much? I'm new to all of this and get lost with all the brightness/black level numbers being thrown around. In real world usage is the f8500 worth the price premium, or is the st60 shaping up to be the best bang for the buck tv this year?