I would wait a few months. With Sony's announcement of a 599.99 second gen player in May, it will force the other manufacturers to drastically reduce their retail price point. The only player that should be immune to the new pricing will be the Pioneer Elite player.
I don't know. Originally priced at $1,300, Panasonic has positioned their player as an "elite" unit as well, so I wouldn't expect their next offering to be as cheap as the Sony (though I'd like that). But if they don't offer 1080p/24 in the near future it does give them a little less to stand on, price-wise.
I'd recommend the Panny for the long run if one had to choose from the current standalone players. If you just want to get your foot in the door get the Sammy. You can get one pretty cheap right now since the new model is around the corner(April).