The issue isn't "too many" endorsements, it's from whom. Clearly, the Bush/Rove/Perry wing of the party recruited McCaul and backed him with their machine, hence the wide array of endorsements. Now if you see those as standard-bearers for what you think a GOP candidate should be, you should be voting for McCaul.
If you think your standard-bearers should be more conservative than that and independant from the Bush/Rove machine, you should be voting for Streusand.
In part, I'm sending a message that Bush/Rove should not run away from true conservatives who aren't their RINO annointeds, as they did to Schundler and Simon. They chose to back the "electable" RINO and then left in a snit when the RINO couldn't win the GOP primary. (In California, after losing to Simon, Bush/Rove recruited pro-abortion, pro-gay Arnold and annointed him rather than the conservative McClintock.)
In the CD 10 race, there are no Democrats to be concerned with. We can just vote the true conservative. That's what I plan to do.