ok here is some more recommendations..
first and foremost the PODxt is a very very versatile unit but gets some negative feedback from people for being brittle and toneless etc etc.
I myself sorta felt the same way at first, you really have to tweak and tweak but if you start finding out some of its little tricks you can nail convincing tones really quick..
If ya get the metal pack go to www.peavey.com
and download the 5150mkII manual in there you will find the settings for Eddies tone and its perfect on the pod.
Get manuals for all the amps where applicable most will give ya some sort of preset guide to dialing in some tones.. IE Mesa, Peavey, Bogner, etc etc.
Again play with combinations never heard of.. One of my sweetest tones is the Bogner Ubershall thru a small 1 x 10 cabinet..
Really play with the mic's theres only 4 but you add 4 mic's to say 20 cabinets each will have a different tonallity. This is where most people get frustrated cause they want instant gratification. Tweak those parameters and tone will follow.
And last but not least if you have AIM shoot me a IM by the name Ibanezcollector2 and I can help ya out as much as I can and share some more secrets I have learned from reading and absorbing as much as I could.
And I got some cool patches too