My 1st "lurcher" was a 1st cross collie whippet, that threw to the collie, it taught me that a dog needs the speed to catch 1st and foremost.................. a great knock about for a lad and made me think outside the box and use field craft to get a catch but not an ideal 1st dog.
My 1st decent lurcher was a beddy\grey X collie /grey, great little dog, took a lot of game with minimal lay ups. Best £35 I've ever spent.