As John points out, now would be a good time to find some deals with the sales coming on, especially after Christmas. I would also visit the usual suspects TJ Maxx/Marshall's, Filene's, Nordstrom Rack. Our local TJ Maxx and Marshall's had some shirts that stood out from their regular fare such as Joseph Abboud and Ted Baker, each with some double cuff models. There were also a large number of Polo dress shirts including spread collar and double cuff models (not just the standard Polo button down). Also look for Ike Behar in that price range. I think any of those would make good choices. If you have the time and access, hitting a couple of thrift stores might not be a bad idea either. It's likely you can find Brooks Brothers, Joseph A Banks, etc. without too much difficulty and if you're lucky you can get all the shirts you need for $20-$30 total with a few ties thrown in.