I'm considering either the Pioneer PDP5050 (or 5060) or the Hitachi 55HDS52. If anyone is able to answer a few questions or provide their opinion, I'd greatly appreciate it.

I see that the Pioneer PDP5050 comes with a media box. What are the benefits of a media box. BTW, I will be placing the tv on a stand, not mounting it on a wall. I also saw the PDP505a at Costco for less $. It doesn't appear to have a media box. Is it worth the extra $ for the 5050. Has anyone seen the 5060? Are there big improvments to this generation?

How does the Pioneer PDP5050 or 5060 compare with the Hitachi 55HDS52. The optional swival stand on the Hitachi seems neat, does anyone have it and is it really that great. I see that Hitachi's 42" plasmas have ALiS. Can anyone explain this?

I'm a little concerned about SD picture on a 50" or 55" plasma. Does it bother anyone?

Any opinions on the Pioneers vs. the Hitachis would be appreciated.

Thanks so much.