With the Helix I believe they are almost on par with a top quality tube amp sound-wise but I don't believe they will be able to match the sound and feel with the current processing power/architecture/algorithms. That last bit could require a new approach. The sound is great but as a player you notice you're not playing the real deal. I believe the Neural DSP Quad Cortex could set a new standard. I really look forward to test it and I hope for Line6 to have an answer ready in the coming year.