No-one seems to be considering the Samsung players much on the forum.
The 6900 now at about £200 seems to hit all the right buttons with iPlayer and Lovefilm on the way, other apps, file play from network and USB, (including NTFS for files > 4Gb), very fast loading times, and is well rated for picture and sound quality in several reviews. I saw it myself and in terms of picture from a brief demo it would be hard to fault.
It looks like Samsung are now bringing out the 7900 which is essential the 6900 with 2 HDMIs like the Panasonics.
I also had my mate's Samsung 3600 on my projector, and set to 24fps it was a smooth and degailed watch, colours looked fine, and with the HD audio bitstreamed gave a definite improvement over standard DD / DTS, especially the width of the soundstage. The upscaling was maybe very lsightly softer than my XDE 500, but was absolutely fine even on a challenging DVD like Stargate.
So many conflicting views and reviews so it's hard to know if BluRay players do change in quality much when used over HDMI, but for me the Samsung is worth paying a bit more for the NTFS and fast loading. Tried to get one on Sunday but they were all sold out.