ah well see what happens in later eps. My money would still be on Shinn though cause of his immense hatred towards Freedom (Ep33). Kira Obviously kills Stellar though (Same ep i think)...
One of them will die in battle against the other though and its just a preferance who you like better as to who you reckon will win....

Unrelated topic - I havent seen much of Astray and i was wondering to those that have Is there any showing off of Gold Frame or is it Simply Red Vs Blue