I run my Helix directly into the FX send of my tube head, a PRS Sonzera 50. I usually just disable the cab IR's and run into an EVH 2x12. I wasn't very fond of it at high volumes at practice the first couple of times, but decided to use the headphones out into my amps return just to see how it would sound and it was wonderful. I don't necessarily think that FRFR is a must have thing. I can see where someone who wants different cab sounds throughout their set would benefit, but I can dial in what I want to hear with my cab.