Hiii iv read lot of good things about Yongnuo flashes mainly the YN460II and the YN560I/II.
Lots of leading strobists love them. They seem to be the goto hot shoe strobe these days since Vivitar went and we lost the 285.
If its fixed studio work if I was you id go for the YN560 as I believe it has a PC socket so you can run cables as apposed to optical or radio so you should have no misfires.
YN560s are now being shipped with metal feet too which is nice.
f**k any form of TTL IMO do it all manual.
Looked at brollies, stands, brackets and backdrop stand and drops yet?