We are having a huge discussion about game models in the 'concerning tyranid models' thread. Dawn of war 2 space marines are best space marines, by far.
Behaviour should be rewarded for having normal sized head space marines good job doing something different than the rest of the retarded pea brained space marines.
Man the best frame of reference for space marine dimensions is the Horus Heresy artwork. Really, straying from anything Black Library related seems kinda pointless!
There's a few, loud, bad apples out there mouthing off about this sort of transparency where we're more like friends with the devs... and to those people I say:
In all seriousness though, I would of preferred of the Space Marines were similarly proportioned to the ones in DoW2, they are a perfect balance between realism and eye candy IMHO. I wonder if there is still a chance the EC models can be changed and whether or not it would be worth while changing it. I'd guess it would be worth a poll thread.
inb4 Ordo Malleus. You shall be judged for your actions battle brother. If you are found wanting, the endless void of the warp awaits you.