Prima Luna Dialog 3 vs Dialog Premium

The Dialogue Premium pre-amp is a step up from the Dialogue P3 in terms of performance and flexibility / utilization.
Here's a link that depicts internal components/circuits used in the Premium. http://www.primaluna-usa.com/dialogue-premium-preamplifier. So It's dependent on you and if you want the best or  would rather settle for the lesser to save money.
I personally would select the better of the two. Even though more costly then the Dialogue P3, the Dialogue Premium is still a high value component, and I think with enough looking and time you can probably find one used, if you want to save some cash.
I saw where there's a listing for the Dialogue Premium Amp in usaudiomart.  An option would be to run an "Wanted Ad" for the Pre-amp in usaudiomart (free)

   

If you go to the Primaluna web site, you can download Owner/Operator Manuals for both the Dialogue Three and the Dialogue Premium. Both have a description of parts used and specifications that you can compare.
http://www.primaluna-usa.com/owners-manuals

Jeff
It would probably be interesting knowing what you decide on to purchase

Brad