I wouldn't get too caught up in the whole SS thing. A lot (not all) of the SS stuff tend to be on the bigger heavier side. Personally If I wanted something on the bigger and heavier side I would (and did) get a lurcher. I like my whippets to look and therefore run like a whippet should. There are plenty of good whippets out there who are being worked hard. My advise would be to take your time, pick a pup from working parents and look at feet, temperament, teeth, coat etc before colour. Good luck in finding a pup you will have fun with a whippet that's a given.