Migration Exchange 2003 to Exchange 2010

Hi all, I have an environment with the following

2 servers Exchange 2003 (6576381) on Windows Server 2003 R2
My domain is Windows Server 2003 R2 DCs
Forest Functional Level "2000 Mixto"
Functional Level Domain "2000 Mixto"

I will migrate to Exchange 2010, which would be the first steps?

1. Raise Forest Functional Level Domain and Windows Server 2003
2. Insert two new Domain Controllers with Windows Server 2008 R2
3. Install and start migrating to Exchange 2010

My question is if I install the DCs to Windows Server 2008 R2 and supports Exchange Server 2003 6576381


regards

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Microsoft Certified IT Professional Server Administrator