Soma makes a pretty nice rack in your price range that would be good for your intended purposes. The Axiom Streamliner is about the same price but heavier and sturdier. I bought my rack from England because the British cycling websites seem to offer a lot more options for better prices (eg, Wiggle, SJS Cycles). I ended up getting a Tubus Cargo and it is probably overkill for my purposes (mainly commuting), but I wanted something strong enough to handle panniers and heavier loads in case I ever do any loaded touring. Also checkout Velo-orange.com, which has a nice selection of racks for good prices.