Apologies, if this has been asked before, I have done some research, haven't found answers to those specific questions.
I recently got Line 6 DT25 amp, which I must admit sounds pretty nice. The high-gain amps are so so, but really enjoy Brit* models. Mostly use the amp for recording using a reactive load box and IRs. I was looking at getting a multi-effect to complement the amp. Initially, I was looking at Helix and Headrush, although it seems that Line 6 multi-effects will have much better integration. Then I have looked at POD HD500X. According to other threads, Helix is better sounding than HD500X, however, I was wondering how does Helix stack up against HD500X used with DT25? I know that both effects can be integrated with the amp, but is the integration quality the same/similar? I believe Helix integration wasn't available prior to a firmware upgrade. Is it worth running either of the units through a tube amp? Some reviews did mentioned that it helps to remove some digital artefacts etc, but not sure how significant that is.