I just downloaded the Celestion Pick-5 Mix & Match and I was blown away by the several hundred (literally hundreds in every usable sample rate) mic and speaker combinations that they send you. They make a huge difference when recording into Pro Tool. The Vintage 30s sound the best to me so far, but the Creamback and Greenbacks sound great too. I am willing to check out any and all IRs that are made for the Helix, as they truly improve the sound like you can't believe until you try them.