I LOVE some modeling amps, alot of people won't admit it, but some are better than tubes.
I would go with the line6 if your going to use it for multiple sounds/tones, but if your looking for one tone that rules, you'd most likely like the Legacy.
I personally think the best amp there is is the Johnson JM250h ( ok, I know it's a head)
, but that just IMHO.
If you want a blues tone that totally takes your breath away then go with tubes, but if you won't a lot of different sounds/tones, go with the Johnson or the Line6.
(p.s.- are you a forum member at Jemsite?
When attempting the impossible, you achieve the best possible
