Hello Leitner6 -
Just a clarification about balanced inputs: as you point-out, balanced inputs are part of the Platinum Edition upgrade for the DNA-225, but this also includes a complete rebuild of the amplifier. If you wanted *only* the balanced inputs installed, the cost is $450. The upgrade literature does not mention this specifically because the question doesn't come-up often.
One other thing: try to arrange a home audition whenever possible. I know this is easier said than done sometimes, but it is worth the effort. If you are seriously interested, you should be able to arrange this with your dealer.
Please contact me directly if there are any other questions about the DNA amplifiers I can help you with.
Best regards,
Steve McCormack
www.SMcAudio.com