You might also was to consider a Sunpak 120J TTL. It has a decent amount of power, but can also be used as a bare bulb. I have the Bronica TTL module for the ETRSi and SQAi, as well as the standard shoe and a TTL module for the Nikon F3. I usually don't use it in TTL mode. Likewise, I also have an Armatar LR300 that works great with these cameras (it's a Vivitar 283 modified for more power and Lumedyne flash tubes/reflectors).
My bracket of choice for medium format is the JustRite. By far, THE most comfortable bracket for medium format that I've ever used in 30+ years. I also use these brackets with a Metz 60CT-1 and they work great.