I'll admit to being in the dark about the quality improvements in the Line6 family.
I use an X3 Live at the moment and I'm happy to be honest as I don't use any of the wacky effects, just the amp and cab sims, and basic effects like chorus, reverb, overdrive, compression, etc.
I know the Helix gets named quite a bit on here but how does the level of improvement go from model to model? By that I mean is the HD 500 vastly better than the X3, and is the Helix vastly better than the HD 500. As I've said previously, I'm not interested in exact replications of named brands, just good quality effects. I know it's all subjective but is it worth me upgrading or just stick with the old X3, what's the general consensus?