RoXterra roof racks, low rider?

I'm sure a few folks here have a roof rack from RoXterra, I was looking at their Low Rider and it looks to be about the perfect size for taking supplies camping etc. I'm torn between the steel version and aluminum, its about a 25 lb difference, the main thing is the cost. It's almost a $800 difference..( $586 vs 1362) Thoughts? I looked at cheaper DIY offerings on Youtube where you grab a golf cart rack and DIY, I'd rather just have something specifically made for my Xterra.