Used a zen tour for a while, looking for a new portable interface...wondering if I should go for another Zen Tour, or something else.

I really only need 2 preamps. Converter quality for monitors/sound is important.

Interested in switching to universal audio perhaps to experiment with some of their plugins, specifically guitar amp sims for when I'm traveling.

How do the converters on the Arrow sound compared to the Zen Tour? I like the portability of the Arrow, but don't want to sacrifice the sound of my monitors/playback.

Options to look into?

I'd read this:
AFX2DAW now available for Discrete 4 & 8 Premium owners

Then this:
Antelope Zen Tour

Then this:
Antelope Discrete 4 Interface for $899

and then decide if you still want a zen tour or any other Antelope product.

Deciding between an Arrow (and eventually a Satellite for mixing) or a Apollo Twin Quad.

Other than SHARC processing for mixing, is there anything superior in the Twin?