although I've got the Tubus Cargo I'm partial to the Topeak Super Tourist DX for the flat aluminum plate and lower rails. It's nice to not worry about things pressing down into the fenders/tire and the lower rails make removing goods strapped down on the rack easier when there are panniers on the lower rails. I had the DX for a year before getting the Cargo and liked the lower rails so much I had another set brazed on the Cargo.

That $15 MEC rack is an impressive deal.

http://www.topeak.com/products/Racks...tDXTubularRack