Do you mean WAN-LAN throughput? That TL-ER5120 can do 350Mbps (
http://forums.smallnetbuilder.com/showthread.php?t=6612)
I used to have the Draytek 2920, loads of great features but unfortunately 135Mbps WAN-LAN throughput. Now I'm on the Cisco RV042G, does 609. That should last I hope!