Ravenous

I recently picked up a pair of surround (ss-5) and a center speaker (sc-5) on woot. Now I'm just looking to complete the set. The sub that I see normally going with those is easy enough to find, however I can't find the front speakers (sb-1) anywhere. So my choices are either wait and hope some turn up, or get something different. Is having a matching set important enough to wait in this case, or are there some other ones that would work just as well? I've considered the newer model in the synergy line, such as the b-2 or maybe the sf-1. Would either of those be okay?