Instead let's take a look at the two Forge World releases that the Space Marine rumours are overshadowing.
Both are from the forthcoming Horus Heresy Book, Massacre, and hail from the Legio Cybernetica. Let's start with the bigger model...
Castellax Battle-Automata - £36
Not too badly priced, when you get the arms in the kit, and a plastic Dreadnought is £28.
I really like this model, it looks imposing, the mechanal parts look workable and I like the grabby claws. My favourite touch is the skull at the centre of the model, giving it an off centre focus, and a nice bit of grimdark.
I tempted to say it borrow a little from Warmachine Warjack's but I think that's just the shoulderpads. It's certainly more balanced it its proportions than PP's models.
There's some nice detailing on the model, combined with some good space on the armour plates for emblems, battle damage etc.
"The most common of the widespread Castellan-type battle-automata in service, the Castellax is a general battle unit developed during the Great Crusade from its ancient forebear. Primarily intended for siege work and shock assaults, the Castellax Battle-automata is a hulking humanoid machine with a notoriously aggressive and responsive machine-spirit, and an enviable reputation on the battlefield.Magos Dominus with Rad-Cleanser - £20
The Castellax, employed in units of one to five by the Legio Cybernetica, has a standard configuration of bolter and bolt cannon armament, and is able to maintain a punishing barrage of firepower as it advances."
I think we've going to see this model as the basis for more than a few tech priest conversions.