MonitorMan get a point suggesting using the Connector Solution, it's really simple and nifty.
If you guys weren't planning on working with a new DB from zero, I'd recommend upgrading your DB to 7.6 or 8.0 and then going to 8.1 (don't need to use same infra, just point to the old DB when installing SMP).
Case you have multiple custom dataclasses, associations, assets, etc, just import and export them to the new console, works fine, no issues. Just don't forget to check dataclasses association with default assets.
Another great tool is using Replication rules, it really works neat as well.