WRX front disc guard

Howdy,

I have a WRX with additional WRR wheels. I want to do a quick swap back and forth, so I be keeping the WRX rotor/caliper for both sets of wheels. This means I have a rather large rotor going offroad. I am no pro so it won't be that far off the road, but I don't want to bend a rotor and ruin my day 10 miles from civilization.

I am thinking about getting the following:
http://www.interstatecycle.com/catalog_product_detail.asp?CatalogCode=7645&LevelCode=68860&PartHeaderNumber=1191063

The only problem is that I can only find it in blue, and my bike is black on black. There don't appear to be a lot of choices so I guess I will be getting this and having it annodized black. (Where?)

Does anyone have a front disc guard on their WRX? Would ya'll say that this is a necessity if I am going offroad with such a large disc up front? Are there any other choices than what I have already found?

Cheers,
P@