Sony BDP-S550 vs 350 vs PS3

[versacestl]

Well lets see, i can tell you my specs:

T.V: 61.5" Samsung DLP HDTV - Connects HDMI - To Harmon Kardon AVR - Connects HDMI to Hi-Def Direct TV Reciever
The Blu-ray will be Connect HDMI to the Harmon Kardon AVR

That's how the setup currently is.. I think the Harmon Kardon model is AVR-146
I'm not 100% sure as i am not currently by it but it might be the 5.1 model.
I realize that i could only utilize up to 5.1 which suggests the 350, but i am also considering expanding in the future to a bigger system and if possible don't want to have to purchase another blu-ray just to get a 7.1 spec

Also, What are the odds of the 550 and ps3 getting a significant if any price drop after this holiday season? - This could change a lot of buying points.

One more thing, If there is a better way to set up for the best A/VQ then please let me know..