Just saw a mention of this, looks like it might be interesting and open up a few linky up options

http://www.easthighlandway.com/index.html

Saw this last autumn just before I went to aviemore but didn't have enough pink tickets to do it.
Looks good though.

The 'highland 400' goes pretty close to this also, at one point
Might also be a good consideration

http://www.highlandtrail.net/

I was looking at this last year with a view to a big circuit, West Highland Way starting at Drymen, East Highland Way, own route south through the Cairngorms to Killiecrankie, Rob Roy Way back to Drymen.