Siege Tanks, obsolete?

[Quirel]

Still not convinced that the Banshee is too weak for spearheading. Invisibility aside, they do 12x2 damage and have 140 hp (more than the Viking).
I guess I should take the time to admit that the Thor is probably keystone to new Terran strategies, to avoid the old Goliaths/tanks combination that is overused in SC (Although the Marauder helps alleviate this problem)

[Pandonetho]

It's not good for spearheading because it soaks 0 damage for your ground forces, which is what Starcraft is, a ground based game. It also doesn't block or take up space so that opponents need to travel around it.

Also, 140 HP vs 400 HP, you tell me which is a better damage soaker/spearheader.