CCR 1036 performance.

Hello,
I am looking for a core router and a NAS. Right now i am planning to deploy a single device in my NOC as i am just a startup. I want to know will ccr 1036 will serve the following purposes :

  1. Customers count : 2000
  2. Bandwidth : 500-700 Mbps
  3. Google peering : 100 Mbps

It will also run BGP with the main isp.
Also i want to know how important RAM is in the above scenario. Currently i am confused in following two models :

  1. CCR1036-12G-4S
  2. CCR1036-12G-4S-EM

Please help!!