Give this site a shot:
Not as many people frequent it anymore, but most information on there is very informative and backed by math. At one point it was considered equivalent of "elitistjerks" forums for SWTOR theorycrafting.
I will also second to visit the individual class forums though. Unlike WoW's, SWTOR's forums are often just as good source of information as they are of trolls (except PVP forums... stay away).