Metz 45 series are excellent. Of course , no TTL; your hotshoe doesn't offer TTL anyway.
A bit expensive, but top quality and durability. Myself, I have a 45-CT1 (the precursor of CL1) and a 45 CT-4 (the one in the avatar).
Downsize of CT1: just full power on manual mode (the CT4/CL4 offer partial manual settings and "winder" mode, and a second flash head on the front)