I've been tempted to build a light 7SAUM for a long time, but then I found the Kimber 280, and the shine wore off of a build.

If I were sitting on a TI action with .473 bolt face I'd build a 7-08/AI or 260/AI. Most likely dupe the TI/MR barrel profile, and edge mountain rifle McMillan for the stock.

Building a midweight on a TI action just seems wrong, but I guess it depends on what you are planning to do with it.