Thanks to everyone's very favourable comments on the Isabella, Isabellina DAC and Amphora amplifier, I finally pulled the trigger a few months ago on an isabellina HPA. Just got mine on the 24th from the Canadian distributor, and have about 80 hrs. on it now.
My goal in the headphones hobby is to go as far as i can go with a dynamic setup. I came from Stax SRx MkIIs and ended up getting rid of them after 30 years of on and off pain in my ears!
I listen to about 80% to classical music, with an emphasis on piano. My old main rig had Magneplanar 3as in it.
My current headphones are HD650s (SAA Equinox) and K701s. My source is a Macbook Pro (2009) using USB out and mainly lossless AIFF files, but some MP3s up to 320 bitrates. I also have B&W P5s and Sennheiser IE8s for portable (and quiet time) use and a HeadRoom Total BitHead amp.
I have a number of questions of course as I am fairly new to this hobby, and I am patiently waiting for burn-in to finish! So far I am very pleased with my isabellina,, but have not done any critical listening at this point. My Equinox cable is new too, and my K701s probably don't have more than 100 hrs. on them so I have a lot of things going on at the same time in terms of burn-in.
If I had to make a choice on the synergy of the Isabellina with my headphones, as classical piano comes first for me, I would take the K701s. I am starting to get better layering of instruments in the orchestra with the Isabellina, and the tone of a grand piano with the Isabellina/701s is dead on, IMO. That being said, I also like the warmth and bass of the Senns for just about everything else - and particularly strings/violins.
Next steps? Break everything in through the Summer, and then deciding in the Fall on one of the flagship headphones, and then at some point, whether it makes sense, with only headphones use, to go beyond the Isabellina.
Thanks Vinnie for making a great product, which I am enjoying very much so far.
I am 'Ridleyguy' on the Head-Fi Forum, so hopefully will see some of you over there. Cheers!