For the sake of getting something moving I'll vote Spak.
Hitting a mafia is statistically in town's favor. A lot of the posts have been pretty ambiguous and not very telling of much, and all I'm getting from Spak are votes and the occasional odd post here and there.
I'd also put emphasis on Nuclearspeed for his pretty cryptic posts and lack of participation. With both mafias sending in hits and the townie roles doing work, I'd suspect Ceric is one of the remaining townies, possibly the miller, and not necessarily an issue.
A lot of suspicious people will just be purged by activity anyways if they don't speak up.