Yeah Line6 are really something else . I've got me a little 120 watt (I think) Line 6 Spider III Amp. And God damn! It's got anything I could ever want in one amp. The problem is though, The sound is very ... Electric. I don't know how to describe it. But, It's very hard to get that cool valve sound you can get from a fender or marshall amp, and guitars with coil pickups sound pretty ghastly going through it Which is a shame, because I do like to play tinny sounding songs occasionally ... over all though, fir what I'm currently doing it gives me enough versatility.
I have never gotten the chance to play a 12 string . I've always wanted one of those double-necked Les Pauls though.
Playing a 6 string bass must be mad . I've played a 5 string, and owned a couple 4 strings. I found the 5 string really cool for playing Reggae style songs, getting that deep warm groove is something pretty sexy. My favourite bass to play was the Ibanez SR-500. It's not the best thing in the world, but it had a really nice warm tone to it, I don't like bright sounding basses, I like to have that deep buzzz, you know? lol. For a while though, I have had my eye on a Warwick Corvette, Passive. They look real nice, and from what I've heard, play and sound really well.