hmm a guitar amp with PT.. I have a shitty bc rich knockoff electric and a nice acoustic hooked directly into the firewire410 and they sound great. I have not heard of going through an Amp before PT but it makes sense (guess it's like using a preamp for a table). interesting.. i guess authentic AMP signatures is the reason for using it (as opposed to emulating an AMP).. I always thought an emulated AMPs sound pretty good, although I have not compared it to an original.
I know this is off topic but, what is a nice cost-effective AMP to use in a home studio?