I too am a fan of the Deerstalker hat, and will one day replace the one I used to have.

I followed MacMillan of Rathdown's comments and suggestions to the letter when constructing my daywear outfit. The jacket and waistcoat wern't the traditional tweed, rather brown corduroy. Jock Scot said it looked great.

I think this falls into the spirit of the tradition rather than the rules of the traditional.