As I was driving home from work last Friday listening to some Porcupine Tree, I was reminded of this thread.
PT is one of my favorite bands - Steven Wilson is both a great songwriter, is blessed with a very distinctive voice, and is a HELL of a producer, I get all gushy when I talk about his mixes. Importantly in this context, however, he's also not afraid to play with modeling gear. Live he uses a Bad Cat half stack, but in the studio pretty much anything goes.
This sort of came to a head a few years ago with the release of their (excellent) album "Deadwing." On it, Wilson ditched his Bad Cat live rig and recorded the entire album with a Pod (though, to be fair, he was running into a Marshall 4x12).
This makes for a pretty interesting listening experience - you can listen to the same band, with the same producer, on "In Absentia" (the release before "Deadwing") or "Fear of a Blank Planet" (the release after) using primarily real amps mic'd up, and then pop in "Deadwing" and hear the same guys playing with modeling gear.
To my ears it's clear that In Absentia and Blank Planet do have better sounding distorted guitars than Deadwing, but what really jumps out at you is the fact that in the hands of a competent producer, you can get pretty damned good results out of a Pod. Normally I have a pretty good ear for this stuff (I'd ID'd the Pod on the first Revis album within ten seconds of the distorted guitars kicking in, checked the liner notes, and sure enough...), but I had NO idea he wasn't using his Bad Cat rig until I watched some of the included studio footage videos, saw him tweaking the proverbial red kidney bean, and checked the liner notes where he proudly states it was all line6.
I think he did it to prove a point, really, about us analog tube snobs.

He certainly succeeded, in my eyes.