If you are looking at the AX5 Twenty, you should also look at the Ayre EX-8. I personally liked it better than the AX-5 Twenty but that's just my opinion based on a side by side comparison using my Harbeth speakers. I recommend listening for yourself though as they are both great amps and your listening priorities may be different than mine.
I ended up buying an Aesthetix Mimas integrated to replace my Ayre AX-7e and Ayre Codex which I preferred to the Ayre amplifiers.
Good Luck!