Would Peachtree Decco be a step up from Rogue 66?

If so, probably mostly due to the DAC.

Why not just try a good external DAC with the Squeezebox? Most people agree that a good outboard DAC is a step up with the Squeezebox. That would probably accomplish the most.

Why go with the Decco one box solution -- preamp, power amp, and DAC -- when you already have a preamp and power amp? I would think the Rogue is a better preamp than the preamp in the Decco. (I don't know much about Threshold amps.)

Overall, it would be less expensive to buy a NOS DAC (the $200 Valab DAC sold on eBay is highly regarded, as are the Keces and Audio-gd DACs) and a decent digital cable, which you would have to buy if you got a Decco anyway.

Also, in talking to a New York dealer and in doing my own web research, I was left with the impression that Peachtree product reliability has been "spotty" at least in the past.

Take a look at the Peachtree Nova. Ive had it for about a month. I love it! the new DAC and extra power makes it worth the cost over the older Decco.
the Quality is very good too

Thanks everyone. I guess I was wondering if a preamp+DAC combo would be better bang for the buck than separates. Sounds like the standard route of adding a DAC is the way to go...