I'm looking for a single device with 16 or more copper gigabit interfaces that can perform NAT, CBAC, switching (multiple interfaces on the same VLAN), multicast, and BGP. I currently use a 3825 with Etherswitch modules but I want better performance and GigE rather than FastEthernet interfaces. It doesn't look like the Nexus 5000 or Catalyst 3750-e support NAT or CBAC. The ASR 1002 seems like an option but I'm unsure if I can make multiple interfaces part of the same VLAN with that device. Also the potential complexity of the ASR or Cat6500 series are intimidating. On device packet capture is a desired but not required feature.
I'm looking at Juniper's lineup as well but would prefer to stay Cisco only. Advice very much appreciated.