Take a look at the Ascender kit. It's not on your list, but it's excellent quality, a great trail truck, and a fun build to boot.

The ECX is ok, I've heard good things about it performance-wise, but it looks toy-like to me. Haven't heard anything bad about durability.

The SCX10 is tried and true, but parts supply is a problem right now. Expected to last until late May/Early June. The II kits are becoming hard to find and the gen 1 kits are all but gone.