Cerntrally Manage TMG Policy deployment

Hi All, new in TMG, required help in deploying TMG in TWO AD Sites.

I have below environment.

Purpose: I want ménage my all server centrally, let say if i create a firewall policy it sould be propagate in my both location TMG servers

Environment:-

  AD SITE A                                           AD SITE B

  Internet ISP1                                   Internet ISP2

  Physical Server 1                             Physical Server 2

Query:

  Can I deploy TMG standard Edition on both location and manage it centrally?

If in case NO

   Which version of TMG I have to install on both AD Sites? 

   Are only two physical servers are enough?