I wouldn't bother with the front lip, you will scrape it everywhere, its unavoidable in Darwin. I've had my front bar re-fiberglassed about three times so far and you only have to look at it now to see what becomes of it. I'm pretty careful too.
Forgot to add, have a chat to Stuart, the MD at City Tyre Service on McMinn St. He helped me out with my 18x8 rims and tires when nobody else had the range (and just seemed like they went interested in making an effort).