Well..., I'd say the key is the incredible PODXT tones that kazrog and DIOBOLIC5150 posted here. I've recorded the PODXT Pro many times and the bottom end always sounds like crap on the heavier amp models. These two guys dialed in incredible tones and the bass response sounds like a real amp to me. No small feat in my opinion, these guys have VERY good ears... As soon as you get your PODXT, load these tones and check 'em out. I'd say the best thing is that these tones are going to sit incredibly well in a mix... Also the Waves C4 set near Andy's recommendations really brought life to these tracks...
Steve