Wow! If you have the money for the full SMc Audio modification to your present amp, GO FOR IT! I have an SMc modded DNA-1. The Revision A+ mod was done about a decade or so ago. It sounds fantastic and I'm sure if I had it upgraded to the Signature mod offered now it would be even better. Steve McCormack is a great guy to talk to and work with and is every bit the designer as John Curl is at Parasound.
In talking with Steve he expressed strongly held opinions on the parts that he selects for his mods down to the quality of the fuses he uses.
I'm sure there are many fine amps you could buy with your generous budget. If you're in the mood for a new shiny beast that's cool, but if you let Steve do the full monty on your DNA 500 you will be a very satisfied listener. The DNA concept design of mating each output transistor with its own generous capacitor does, as Steve intended, yield a "quick" sound with clean impactful initial note impacts. PRAT!
All the best!
In talking with Steve he expressed strongly held opinions on the parts that he selects for his mods down to the quality of the fuses he uses.
I'm sure there are many fine amps you could buy with your generous budget. If you're in the mood for a new shiny beast that's cool, but if you let Steve do the full monty on your DNA 500 you will be a very satisfied listener. The DNA concept design of mating each output transistor with its own generous capacitor does, as Steve intended, yield a "quick" sound with clean impactful initial note impacts. PRAT!
All the best!