Thanks for the input on this. I have the Tia Fourte and love it with a dac/amp set up, but have been looking for a great DAP to use as a stand alone. Contemplated the WM1Z and the SP1000, so it looks like the AK might be way too neutral for the Tia. Is the 1.2 FW available to download for a better match? Thanks!
here is the link for the 1.20 FW.
http://walkman.update.sony.net/fw/pc/WM1/NW-WM1_V1_20.exe