Just about asking a similar question looks really bulky...but looks like it got everything in it
Awesome! I'm pretty sure you'll love them. JHAudio seem to be running about 25-30 business days from impressions received until shipping at the moment. The sound is epic / totally worth it.
It's an interesting comparison between the two portable amps I have, in particular. I think overall the ALO has what my personal preference calls the higher sound quality, and the balanced setup definitely seems to expand soundstage and add extra power to the bass. But the Pico Slim from Justin is one incredible / tiny piece of gear. Background is totally black to me (compared to some low but tolerable hiss on the RX MK3 balanced), and absolutely perfect channel balance, even at lower listening levels. It's amazing that something sounds so awesome, is so tiny, and has a 60 hour battery life. Hats off to the HeadAmp voodoo magic --- I look forward to eventually exploring their desktop offerings.
I can definitely see where some of the reviewers are coming from, taking the Pico Slim for IEM use even over impressive bits of tech like the ALO RX Mk3. Also, the fact that you can just stick the Slim in in your pocket with an iPod nano and a little LOD is awesome. The upside in sound quality to the fully balanced CLAS -DB and ALO RX Mk3 come at the expense of a big brick. Long plane flights or vacations --- no problem as long as you can spare the bit of room. But you aren't going to be walking the dog with that combo, unless you want a giant metal brick with you --- maybe in a hoodie front pocket :)
After spending time with both amp setups, I don't feel any need to flip one. In fact, I'm more likely to buy a Moon Audio balanced cable for my LCD-2s, plus an adapter from 4 pin balanced to ALO balanced ---- for transportable use with the RX Mk3 as well.