I have just got a plasma screen, and am wondering about upgrading my Sony 900 DVD. The main reason for doing this would be to use PAL progressive output, but I would occasionally use NTSC progressive as well. I have been told that any progressive player will outperform my non-progressive Sony, even the cheap supermarket ones, and I will only notice the downgrade in quality if I switch to interlaced output. Is this the case in people's experience? What prog scan players are recommended?