I just obtained a stomp XL upgrading from a POD GO so I am new to improved cabs. Flat mode on my PC112+ works well but I found I had to edit the flat mode preset and turn on the high and low cuts, otherwise the tone was crazy fizzy. I have set the high cut at 5K and the low cut at 100. I compared similar patches using the JCM800 model with a V30 cab on the unit vs the v30 (Vintage) emulation on the powercab. In my room I think the helix cabs win however, it's really hard to tell outside of the band mix. Next gig I will go FRFR with helix cabs and if it seems somewhat lacking I will switch it over to the patch I made for the PC emulated V30. I use the PC as a monitor and stage volume and run from the PC to FOH.