SONET MUX

Hello, We are looking for a OC3 -> 3xDS3 MUX. (If it can grow up to a OC12 -> 12xDS3 thats a plus) Sonet side will be 1+1 protected I have looked at the following equipment is there any other sonet muxes that i should look at? Adtran Opti-3 Adtran OPTI-6100 Cisco ONS 15310, 15327 Fujitsu Flashwave 4010, 4100, 4300 Fujitsu FLM 150 Does anybody have and horror stories about the products that i have listed, recommendations, other products??? Thanks Erik