Hi Brad,
I missed responding to this post months ago I hope this could still help you. I am an absolute fan of SharePoint because as a platform I can build a variety of information management solutions on top of it while leveraging on licenses that most companies have already invested on.
However, choosing the technology to use really depends on the challenges you have in your current ECM implementation. The traditional systems are dependable for what they claim to do, however when you move to a platform like SharePoint which provide some of the traditional functionalities and provide so much more in the collaboration and KM aspects of IM it would make your head spin and get dazzled with its infinite possibilities.
So if you are still in the early stages of your ECM implementation I suggest sticking to traditional systems. If you think you are already mature in your ECM implementation then SharePoint could offer you so much more.
One thing apparent in all the migration projects I've been involved in and spearheaded, it would have been a simpler and cheaper exercise if the ECM issues have been dealt with first prior to migration.
Just my viewpoint I hope it helps.
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Maria Concesa Lim
Consultant Information Manager
DataCo Ltd.
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