Router over ASA or ASA over Router??

From a best practice standpoint which is better, ASA on the edge or a router on the edge of your network?

off of the top of my head ASA on the seem like a better design, however, I have seen some networks in the passed with Router(Edge) then ASA.
Jordan TaylorNetwork EngineerAsked:
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David Johnson, CD, MVPOwnerCommented:
ASA's don't have DMVPN or good QOS rules in comparison with a quality router. They both do route packets though. So your needs may vary QOS is important then  cloud < asa > router if DMVPN is important <cloud><router><ASA>

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Andy BartkiewiczNetwork AnalystCommented:
I would say ASA. For most networks you actually don't need a router if you purchase a mid-range layer 3 switch.
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