If you don't want to spend even Tubus dollars, and that is fair enough, then I would go in the opposite direction, and buy a Blackburn knock-off. There are some of these racks out there that have been beefed up with heavier wire, and given that they were reliable initially, are well up to it today. Racks can be a real weak point in bikes where the miles add up. But most cyclists do not even do a trans-am equivalent, and these racks will hold up to many thousands of miles of not over-loaded use. The other trick is to buy them from a reputable supplier, like MEC whose name is on the product. Places like REI, and Nashbar have done similar.

http://www.mec.ca/AST/ShopMEC/Cyclin...cling-rack.jsp

I don't know that the racks pictured have oversize wire, but some I have handled in the store in the past did. Normally these days the wire is sized to the standard 3/8" fittings, which means a huge increase in strength and stiffness over the wire size in the original racks.

Reading through some of the comments one hears negatives like that the rack is too short, and that it can require some customization to get it on. These problems are typical of racks in general, and of the Blackburn itself. Even the premium racks north of 100 dollars are normally too short. Racks are rarely perfect. Many of the really nice ones are too heavy. But you can get upgrades on the performance that set the standard, without having to spend a lot for it.