Has anyone read this book?
http://www.amazon.com/Jagen-mit-Terrier-Hounds-Lurcher/dp/3200011351/ref=la_B00J7A9E4W_1_1?s=books&ie=UTF8&qid=1411411710&sr=1-1
Probably it would be very versatile, as a GSP x greyhound, but perhaps not very good for catching hares ... someone has experience?
Maybe a collie x greyhound would be fine?