i'm close to buying the vali as well especially after reading these type of reviews:
'Vali Sound Signature- Very clean, a slight bump on the mids and a small dip from upper mids to highs. Maintains a touch of sparkle, with lush mids. I’d call it the reference sound signature for a hybrid tube, tubey mids and bass with the details of a solid state. The Heart and Soul of a tube, with the detail of a solid state!
I also shortlisted the amp/dacs listed above too. It's just a matter of versatility, the magni and O2 seem to work well with a lot more headphones than the Vali.
Then again I only have a DT990 atm. I know the Vali would probably pair better with the DT990, but a Magni would be a better investment in the long term if I buy more IEMs/headphones. Not sure if the Magni will be good enough to use with the DT990, that's a compromise you'd have to make so you can use it with others headphones in the future
Edited by eastpac - 1/18/14 at 1:17am