I don't know of any, although I imagine there are. But any benchmarks you find should be nothing more than a rough guestimate for you. There are umpteen variables in play here and thus there is a significant potential that benchmark A will be WAY off with what you will see. Best by far is to set it up and stress it just like your real system is expected to do.
Best,
Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru on googles mail service