Only way I see it working is if the background had an explaination, such as genetic engineering to make the gene-seed compatible (by which I mean essentially turning women into men genetically), and then modelling them so they look pretty much exactly like normal Space Marines (because frankly, under the armour you're not going to be able to tell the difference, and a Space Marine's face is disfigured by the process anyway so they don't even look like men - so why would female Space Marines still look like women?).
And personally, still not my cup of tea. I'd be more interested in seeing realistic Sisters of Battle, in proper heavy plated armour and non-glamous faces. And certainly no bondage-inspired decorations - they are essentially nuns after all.
~Andromidius