I love the FW lists and armies, but you're right, even at local tournaments you might not be able to use the FW lists. Usually at larger GTs, using FW lists is restricted to special or narrative events.

However, the best thing about Marines is that you can have them be whatever you want. I've got no problem with you making your own chapter and color scheme and using the Raptors rules, even SC. Some might accuse you of "goat-marining" but they can just STFU.

There are a few local Badab armies out there, and I'd love to see another one, even if it isn't the new standard FW scheme.