When i was running roof racks on my car was to house a canopy which did the job well for our trip up north.
Racks are easy to install and remove and the accessories are endless. I bought mine via Subaru Ozzy park as they stock Rola (my set is for sale too)

Link to racks for sale: http://www.perth-wrx.com/vb/sale/11817-fs-various-subaru-parts.html

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MY00 GT Forester with STi goodies