I'm currently ampless and about to go to uni. I need something which I can use for a bit of recording and practice into headphones/monitors. I doubt I'll be gigging regularly to be honest. I've found GT8s and XT Lives for reasonable prices over here and I can't decide between the two. As far as I can tell:
Boss: Can use 4-cable method, better effects, (Looks like it might be built better, to me, at last)
Line 6: Better amp sims (providing I get one with the Metal Shop pack), USB patch editing and recording (only really useful if I sell my interface)
Is that about right?
You should be able to use the 4-cable method with the XT Live too AFAIK. Though, personally, I wouldn't bother with the XT, I'd go right for the X3 Live. The ability to layer 2 signal paths together really makes things sound better.