I do agree that live you tend to take a sound you like and stick to it, but the reason I like the idea of the line 6 is the fact that when it comes to recording you can have a great deal of tweakability.
I don't really use pedals, I just play the same sound throughout my set, but recording, different sounds would lend themselves to different tracks.
Last time I was in a studio I used a line 6 pod against my will... there was an Ampeg svt-3 sitting there but he swore by the POD (wish I knew which model it was)... turns out he was right, it was excellent.
Looking to start doing some serious recording work at home and I love the idea of having a rig which I can run into a DAW (especially one that's protools compatible..) and go with. Especially if the same rig can be used for guitar..
Enjoying the different viewpoints on it all though!
Current train of thought is to pick up an XT on the cheap with the bass plugins and use that for a while, if I hate it I'll sell it on and get a sansamp or something next to try. All in the X3 appears to be more or less the same as the XT but with a few bell and whistles, the main one being that it can run two channels simultaneously, but I'm hearing that it sounds awful...
xx