looking for input on Blu-ray feasibility/setup

[robk329]

After seeing a demonstration of Blu-ray at a local SONY store, I have been considering adding this to my home theatre. Of course, they showcase the technology on their best 1080p screen and and A/V receiver. I'm not looking to change my screen or receiver and wanted to know if........a) how much benefit will I get from Blu-ray with my current set-up.......b)what would be the best way to connect to my screen/receiver and the optimal settings for picture/sound. Here's what I'm working with:

Marantz SR7200 AV Receiver
Pioneer PDP- 5040HD Plasma
Marantz CD/DVD Player (for my SACD)

Is the SONY product the way to go? Given the assumption that my Marantz SR7200 doesn't support the latest codecs, is the base model the best choice?