1941 is good for around 30+ nothing more. The performance data is captured based on nothing running on the router other than the testing thruput. NAT/ACL/ other features would quickly drop the performance. I am not quite sure what you would need as a feature on your router. UC540 is a Voice system and 1941W has Wireless... Have you thought to split them out? Get a Wireless AP and a SPA122 for example?
