How do you manage existing GIS data and allow for integration with an Asset management system?

I am using ESRI based GIS software, Postgresql/PostGIS/ArcSDE DB and we have a Mincom Ellipse asset management system.

Currently our all our spatial information regarding asset sites have been recorded as points, this has been versatile for the fact that it accommodates mapping at various scales. Now that we are integrating our Asset Management System with our GIS database the asset management guys want the GIS features to reflect the structure e.g A building footprint as a polygon instead of a point.

My question in terms of the spatial data management. Should I be maintaining two sets of data? One for the asset representations and then one for various mapping tasks?

Thanks DB