Sincere thanks for the constructive responses within the criteria mentioned, which will help in my search looking forward as I upgrade the initial pairing I've decided upon, Bryston 60W/Foreplay II Pre/Corda Opera DAC [Operas DAC being slightly warm with slightly polite HF energy, though airy and fully extended, as evidenced by my referance AKG-701s & even the oftentimes troublesome HF energy(in other systems) of my DT-990s].
Although this initial entry level upstream components chain could and will be improved upon, I have great hopes for it to provide a utilitarian,pleasing reproduction system coupled to the 2.5s, configured in a nearfield configuration, "Within Budget Restraints" at this time!
Again, further insights by owners of the ProAc 2.5 for future guidence are highly appreciated here...
Thanks