I've thought hard about trying to "collect the whole set", but instead have settled on taking a deer in every state(except Hawaii, but I may kill some sort of exotic there sometime so I don't have a disclaimer). Also, not all taxonomists agree with all the minor sub species variations. The argument is called lumpers vs splitters and it doesn't just pertain to deer, but I'd imagine DNA testing would poo-poo some of the subspecies that don't have very specific boundaries, such as islands.
