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ISR 891 for 50 Mbps x 50 Mbps Fiber circuit

I have a Cisco ISR 891 (no-wifi) router that I have been using on a 20Mbps x 20Mbps fiber circuit.  It was been performing just fine.  I am upgrading the circuit to 50Mbps x 50Mbps soon, and I wanted to check if this router can handle that much load.

I don't do anything fancy with the router, just plain old routing (I have a firewall behind it).

Do you think the 891 can handle 50Mbps up/down, and if not what would you recommend for this new setup of 50x50Mbps.

Thanks!
Bob
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Thanks for the replies.  

Since I just need a router that can handle 50/50M (100Mbps total) without any fancy features enabled the Cisco ISR's I require are very expensive.  I decided to go with a couple Adtran Netvanta 4430's.  These units can handle way more than I require, and I was able to purchase both for less than 1 of the Cisco ISR's I would need.  I have always trusted Cisco, but the cost savings makes my boss happy.  

Do you have any experience with Adtrans Netvanta routers, and if so do you like them?
I have about 100-150 AdTrans in the field, they've been pretty good just keep the code updated.  The warranties kick butt too.

Let me know if you have any AOS questions, but the CLI should feel quite friendly, they also have a pretty good web gui as well.
Thansk mgob!  I ordered them earlier this week, but have not received them yet.  If I get stuck configuring them I might take you up on your offer :)
Sounds good, but I expect if you know Cisco you'll pickup their CLI very quickly, AOS is very IOS-yy