Introducing Windows Server 2012 DC to Windows 2008 Domain


We have a domain running at Windows Server 2008 Functional Level (single domain in forest).
The domain has 3 DCs.  We have about 80 users and maybe 100 workstations total.

The Schema Master, RID, PDC, and Domain Naming Master are running on one DC.
The Infrastructure is running on another DC.

I've read articles (and seen a video on EE) that suggest a single 2012 DC can run all roles.  Is this recommended ?  Also, is there any disadvantage to not raising the Functional Level to 2008 R2 or even 2012 ?

The main reason I'd like to do this is to consolidate/decommission old hardware and introduce W2012 into our environment.

Thanks much.
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I keep all of the FSMO roles on one server, however please see below for Microsoft best practice. I would recommend updating the funcinal level, as it offers new features and also optimises applications which link to AD

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lapavoniAuthor Commented:
Thanks for the advice and the link.  It seems in our case that one server should work fine.
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Windows Server 2012

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