DL Shirts usually go on sale. I've gotten them as low as $140 in store on sale to about $300 retail with a code.. Wouldn't necessarily pay over $400 for one but they are noticeably nicer. Single layer cotton shirts are great too though and the level silk blend shirts are great bang for buck. Bamboo shirts are trash for the most part IMO, and they are made of much cheaper synthetics than the viscose tee's. I have a bamboo shirt that I picked up this season and it literally smells the minute sweat hits the shirt and has gotten some weird staining in certain areas. It hasn't reached rag status yet but I use it for lazying about or sleeping in. I would probably even go for Drkshdw cotton over the bamboo personally.