McCormack DNA-225 Platinum and McCormack DNA-500

I own a DNA-0.5 Rev A but since replacing my Thiel CS1.6 with its bigger brother, the 2.4, i have felt this urge to upgrade. While I have read a plethora of kudos for the DNA-125, especially those touched with Steve's highest mods, I have read less reviews about the 225 and the 500. A fellow Audiogoner, 4yanx, had a splendid review of the 225. The DNA-500 has garned some high praise from Chip Stern and a couple of other audio magazines. Although the DNA-500 does not have upgrades to Platinum (yet?), Steve McCormack does have a package that includes cap changes, ect (but not transformer, and I beleive no carbon/siltech). probably the hefty power of the DNA-500 makes any upgrades quite superfluous and redundant. I am very curious to know how a DNA-500 (stock) would compare with the DNA-225 Platinum. After all, the DNA-500 is really TWO DNA-225s. And if we take the enquiry one step further, what would a DNA-500 sound like with the full monty upgrades!! I would value views from fellow Audiogoners!