The only chips that definitively trounce the Reon are the Realta's found in the Denons (and Marantzs?) and the Anchor Bay in the Oppo. The Marvell in the LG and one of the Pioneers? is arguably the Reon's equal.
The Uniphier, like the PS3, is good, but it is not nonpareil like the the Anchor Bay.
* You forgot the Gennum VXP Video Processor.
Perhaps the very best one.
* No HQV Realta on Marantz products. On some Denon products, yes.
* And the Anchor Bay Technologies is not anyone chip, but only the VRS ABT-2010 Video Processor, which is the one that's good.
* And the HQV Reon-VX50 Video Processor is not necessary a good one, depending of it's implementation. But usually it is. Not always though.
* The Marvell in the LG is the Qdeo Video processor chip. Not bad, but not without it's faults.
* The one in the Oppo BDP-83 is by ABT (Anchor Bay Technologies) from the DVDO line of video processors. It is the newest ABT, the same as in the DVDO's Edge processor ($700).
Hmmm... I like all that stuff.