DS-3 test equipment

I've searched the archives and find some hits on DS-1 test gear, but I'm looking for opinions/experience with DS-3 test gear. We've started bringing up more DS-3 circuits, both directly to customers and also for Frame/ATM/DSL aggregation. Telco used to do all provisioning and testing for us, but we are looking to be able to more troubleshooting in-house. Any recommended gear for basic functional testing (clock, loop, insert patterns and errors)? It would be nice if the test gear could do T-1 testing, too. I'm seeing a fair number of hits on eBay for TTC/Acterna gear, but I don't know what I'm looking at/for. I've done BERT testing many lifetimes ago, but don't have any current knowledge/experience. Thanks, Rick