Ken - I suppose a good study bible
can help, but I believe a working knowledge of the orginal languages is best. But I can't help but wonder how textual variants present a real problem. None of them put into question any doctrines. They don't negatively effect christology or soterigoloy. I suppose in that sense a good case can be made the variants are insignificant.
yes? no?
P.S. And just to make sure I am on the right page with the OP, by textual variants do you mean questionable texts like Mark 16:9-20?