Silver Spangled Hamburgs are one of my favorite breeds. I also keep Buckeyes and they are as different as night and day. They don't even flock together. I teasingly call them "Silver Spangled Nutjobs" because they are so much flightier than the Buckeyes. They are also some of the prettiest chickens I've seen. If the SPs are anything like my SSs, you will enjoy them for their zippy personality and reliable egg laying.
Lol! "Silver Spangled Nutjobs", I agree with everything you said about the SSH. We don't have any other breeds, but we have a small flock of SSH's and we love them so much! They certainly are entertaining and, yes very lovely! I love our roo, too. He's such a great guardian for the girls!