Which amp would be better for playing Alt. to Blues?
From Incubus to Red Hot Chili Peppers to John Mayer?
There's very little in it on paper, but I haven't tried the V50 yet. I find the BD a little too piercing and lifeless but it's a perfectly reasonable choice. Maybe look at the Kustom Coupe as well, it has a little more character (to my ears at least).
Is the crate solid state?

If the difference was between a tube and a solid crate, i saw go with the fender tube.
the crate here were talking about is a tube btw.

i would go with the blues and get a nice OD for the heavier side of of your playing style.
Gibson Les Paul Studio
Highway One Telecaster
Dean Evo
Mesa F-50
Laney GH50L
Vox AC30 C2
Ampeg V2