If you're Soundwave as Kirin is Percy, then I'm Ultra Magnus [G1]. Or Primus - probably more Mags though.

I like the idea of 11 - maybe the fights between the two are their way of re-balancing things, and Unicron being a planet Eater is his way of carrying out his role - the universe needs it fair share of destruction, so Unicron embodies it by destroying planets where needed.