I absolutely love my PodXT Pro. Obviously its not going to sound as good as a real amp but that goes without saying. Learn how to use it a bit and it will sound fine. Just remember to change settings with your ears and not your eyes, as sometimes you have to put in some pretty funky settings to get things sounding good.
Try the dual rec model, treadplate cab, 57 on axis, with the tube screamer mod as a boost. have a fiddle with that. I can upload a patch tomorrow if you want that sounds alright.
With the Pod, I dont really use it when it comes to final mixes, but its great for tracking guitars (I reamp the tracks later).