Breachers..

http://www.belloflostsouls.net/2015/05/new-cult-mechanicus-unit-pictures.html

God... damn. Those breachers are fantastic.. Ive made some of my own "Exterminator" style models over the years . .. but finally, 40k gets its own tank treaded beauty. Man do i want some. What the hell army to put them with though.

Those look so much better than those new automata bubblegum robots. Smooth edges? BAH.

I think the big robots could largely be fixed with a head swap, and I already have the concept of one stewing in my brain that would give them one in line with the mechanicus sigil.

But the big take away for me is Grav weapons for an army other than loyalist marines. Now give me my dark mechanicus supplement!

The Robots are starting to grow on me in a funny way, although I will certainly give mine a little bit of Ben flavouring

Those tracked guys look awesome as well, and the "heavy arc gun" seems VERY appealing. Having had some experience with arc guns in some test games, I already love em. I do have an old box of 3 Centurions lying around that could be converted......