Headphone Amp and Dac for Raspberry Pi

[museguy]

Hi Everyone,
Thank you for the guidance.

Have ordered the Audiophonics I-Sabre DAC ES9023 V2 TCXO Raspberry Pi 2.0 A+ B+ / I2S .

Now starting to think about the headphone amp. There seems to be consensus that the B22 is one of the best headphone amps. Found an assembled board on ebay Assembled B22 mono headphone amplifier board would require two boards, heat sinks, case and power supply, seems pretty straight forward. Would combine the Raspberry Pi with Audiophonics DAC and B22 in one case.

Other Options:
Lehmann Clone

A1 clone class A

ZEROZONE JLH Class A 1969 Headphone amplifier

ZERO-ZONE Classic reproduction HD-8-A1-PRO Headphone amplifier finished board

Thinking that it would be an easy way to try out DIY, buy the board(s), case, power supply and try it and see if I like DIY.

Welcome suggestions,
-Mark