$700 each is going to be a hard price point to find anything higher than Sora. Sora works just fine though. Try and look at more than just Redline. There are several manufactures that product bikes in that range so you shouldn't have too much trouble finding something that'll work. Redline is a good bike though and a good value. Others that would fall in that line would be Fuji and the new 2010 line of Specialized Tricross models. Ask you shops for any models they are wanting to off load like the 2008/2009 models. You can get some good deals that way.
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