woah. i always thought kim was going to buy a line6 pod hd300 for portability and simplicity's sake in conjunction with his analog pedals. thanks for the review. i was contemplating whether or not i would buy the pod hd300.
if you only need the modeling capabilities, i think the 300 is enough. otherwise, if you have a slight inclination towards tone sculpting with pedals, i strongly recommend the 500. kase i think with the 300, you only get to use 3 or 4 pedals, and you cant move them around the signal chain (not sure though).