I did more research and it appears that the latest version, branded "Reference" is exactly the same as MkII, with the only difference being the cosmetisc. Here is a quote from Signature Sound website:
"Audio Aero Products get a Facelift!
At the 2005 CES this year, the folks at Audio Aero showed me what is now the new look on their products. Over the next few months, the current faceplate design will be changed to a new look that is a bit more cleaner in appearance. The changes are strictly external, with the insides of all the existing products remaining unchanged, though there are some price increases (mostly due to the devaluation of the US dollar vs. the Euro). For example the Prima CD player and integrated amps are now $2,500 US Retail. Also, having grown tired of the lengthy naming nomenclature of the Capitole 24/192 MKII, with the additional of the new faceplate, the current version of the Capitole is now just called the Capitole Reference (again, the changes here are external only)."
"Audio Aero Products get a Facelift!
At the 2005 CES this year, the folks at Audio Aero showed me what is now the new look on their products. Over the next few months, the current faceplate design will be changed to a new look that is a bit more cleaner in appearance. The changes are strictly external, with the insides of all the existing products remaining unchanged, though there are some price increases (mostly due to the devaluation of the US dollar vs. the Euro). For example the Prima CD player and integrated amps are now $2,500 US Retail. Also, having grown tired of the lengthy naming nomenclature of the Capitole 24/192 MKII, with the additional of the new faceplate, the current version of the Capitole is now just called the Capitole Reference (again, the changes here are external only)."