CSM Bastion which of 2 themes?

[MrBo]

Hello and thanks for looking.
I just bought a bastion for my csm.The question is which theme to shoot for.
I have a large army of black legion, and a medium sized army of Death Guard/Plague Marines. ( white green as well as flu snot green) which I use in the same list.
The units manning the bastion would most likely be black legion havocs.

I see 2 different themes in my head. One The baleful white tower of nurgle, Second The Iron bastion of the Black Legion.
The White tower would be a creepy parchment white with green borders and plenty of rust effects.
The Iron Bastion would be black,silver and gold with a single large red chaos mark (8 pointed arrows connected within a circle) along 2 sides of the bastion.

If enough people vote to sway my opinion,I will take the popular advice,take pictures and post them here within a month.

Update: Finished with the main tower, testing pictures.

http://i761.photobucket.com/albums/xx260/MrBo_photos/Picture117.jpg

http://i761.photobucket.com/albums/xx260/MrBo_photos/Picture116.jpg

http://i761.photobucket.com/albums/xx260/MrBo_photos/Picture119.jpg

Edit hmm well i dont know how to show the pics yet without the link popping up, if anyone can point me to the right article, i would appreciate it =)

[interrogator_chaplain]

Black, Silver and Gold have been done to death. You want to stand out on the battlefield. Go with the putrid white of a decaying corpse!

[Dave Fothergill]

Go with the white it will look great when finished

[euansmith]

Go for both. Paint the upper half in Black Legion colours and the lower half as though the taint of Nurgle is seeping up from the ground and corrupting the bastion.