What is the best backup battery for 2 routers,6 Cisco switches, 2 servers, and 1 dell md3400 storage device.

2 servers dual 550 watts. X185V
2 600w power SUpply dell stroage device. NFCGI
1 x CIsco firewall 5515-X  70W
1 x Cisco switches 3750-X  350W
1 x Cisco switch   2960X   740W
1 x Cisco switch   2960x   370w
1 x Cisco switch   2960x   370w
1 x PowerEdge R210 442B3M1 350W

Need the power about 1hr. This is what i found. What do you guys think.

1x SRT6
http://www.apc.com/shop/us/en/products/APC-Smart-UPS-SRT-6000VA-RM-with-208V-to-120V-2U-Step-Down-Transformer/P-SRT6KRMXLT-5KTF

3x SMX batteries.
http://www.apc.com/shop/us/en/products/APC-Smart-UPS-X-120V-External-Battery-Pack-Rack-Tower/P-SMX120RMBP2U

OR

2 x SMX3000RMLV2U

http://www.apc.com/shop/us/en/products/APC-Smart-UPS-X-3000VA-Rack-Tower-LCD-100-127V/P-SMX3000RMLV2U

4x Battaries

http://www.apc.com/shop/us/en/products/APC-Smart-UPS-X-120V-External-Battery-Pack-Rack-Tower/P-SMX120RMBP2U