Sol,
Yes I think you will be happy with the 'Silver Song' crosses. I have a couple second generation seedlings from ('Silver Song' X 'Polly Bishop') that have sent up stalks. One of these is HUGE and is crossing in the BIG bed. It also has the wide leaves of 'Silver Song', perhaps a bit wider, and has a stronger pink flush. It will probably get a name if its performance continues.
Will be interested what you get from 'Bros'. Mine were big and vigorous but not that red! I did self one of those and the seedlings look much more red. Will know more in the spring.
Kevin