This would result in mono after the amp if I'm imagining this correctly. The LA comp after the cabs sounded sooo good in stereo... it adds a subtle presence my headphones pick up immediately - hence this post ^'_^
Honestly didn't think of profiling the line 6 effects till you mentioned that! Though there are effects that would be great at the front that I simply can't duplicate: envelope filters, feedbackers, 4 more compressors, etc.
Didn't know about the quality loss from conversion but that makes sense. However, I know there are quite a few digital pedals out there, I think at most 3 wouldn't hurt the quality too bad (if I get 2 HX stomps to accomplish what I mentioned).
Regarding latency, if this guy is accurate, 2 ms for the HX stomp shouldn't be too bad. I'd imagine the QC with 2 HX stomps would be sub 10? These units would minimize other digital pedals in the chain. The only other pedal I'd have is a tc spark for a global preset DB boost.
However, something that will influence if I get two HX stomps or maybe a single LT to accomplish the original goal (if one won't do): can I have the QC and the 2 Stomps give midi commands to each other? I'll for sure need the QC to be able to tell the HX stomps what preset I'm on. But what if the HX stomps could control my scenes whilst I'm in preset mode with the QC?