purchasing and matching in Accts Payable

We are looking at uploading our receives with inventory values including landed costs.

Outcome we would like the landed cost items by vendor to post correctly to the gl.  We'd like the inventory to process to the gl correctly without mainting and having

all of our inventory products added.

Has anyone done something similar?  If so can you give us some ideas how we should be approaching this.

Here's some ideas we have, question is there a better way.  Has someone done this before?  if yes, what problems did you run into.

  We have approx 4 months to create interfaces, configure and test before we deploy.