I still use the line 6 pod X3 bean, and Pod Farm for several years now. However, I will be upgrading amp/FX modelling before too long. The Pod HD500x was one of the top contenders due to its price:quality ratio. As well as its availability, features, popularity (for "community" support, and patches) But its not without its flaws, which is why I haven't done it yet.
Its nice that Digitech is releasing something new soon. I started out with a Digitech RP300 back almost a decade ago, then later on a GNX2. (most amp models were meh, but it had a nice rectifier model, and a nice "acoustic" amp model that sounded good through my old Fender Stage 112 SE amp that I had starting out)
But I am sure Digitech has updated there modelling, and FX quality once, or twice since then, and I hope they are doing it this time. Might go that route, especially if it can load custom IRs, and If it has the flexible routing I need. (as I just do home-studio recording)
If Digitech can deliver yet another step up in quality/flexibility at a similar price point, then I will be even more glad I waited, although I also have my eyes on any real updates that Line 6 has in store to compete.