Primaluna separates or Integrated?

Thank you for your thoughts. 
Current amplification is the 150 watt RMS Class D hybrid Vincent SV 236 MKII integrated driving a pair of GoldenEar Triton 3's. With the GoldenEar's having active onboard bass amplifiers, the external amp is only driving the midrange and ribbon tweeter so I probably have more than enough headroom. That said, to get to my "final system" (a great term i hadnt heard before), I'll very likely upgrade the speakers in the next 2 to 5 years. To what, i really havent though about yet. 
In regards to budget, I'd like to stay in the $4K range but definately no higher than $5K. Adding in cost of interconnects for separates is a good point to be added in the $ side of the equation, but musicality satisfaction is by far the highest priority in my search as i would like this to be the last amplification purchase (not including any tube tweaking) to be enjoyed over the remaining 20 to 30 years i hope to be around to enjoys the endorphin inducing pleasure of listening to great quality music. 

It is hard to beat the feeling of anticipation one gets from adding a new component to your system or i would imagine setting up your system after a long hiatus simonbelgium!
Your mix and match configuration with Prologue amps matched with Dialog Preamp along with Timo62's suggestion of Prologue pre matched with Dialogue HP amp raises an intersting question. Do the Dialogue upgrades over their Prologue equivalent have a greater influence on musicality from the speaker in the Preamp stage or in the power amp stage?

incredible!  I can not thank you enough almarg for bringing this phenomena to my attention!  You are a great example of why these forums are so valuable to the home audio enthusiast. Im not an electrical engineer, but I did take a EE course in college and have had a healthy respect for them ever since.  Do you know if all the Primaluna lines would be susceptible to "motorboating" or do any have a more robust stability when dealing with high current at high impedances in the low frequency range of GoldenEar subs?