You'd be the best of both worlds, I reckon.

You'd bring new blood to the company in that you've been out of the place for a couple of years so a fresh outlook BUT you know the company, the environment, probably the systems they use so not too steep a learning curve.  

Could it get better than that?!  I doubt it.

And it's inevitable that there may well be lower grades hoping to get a step up both internally and external to the company.  I know that there were two internal candidates that applied for the job I now have.