So no opinions huh? Or...is it my breath?
My Elec/WP is only level 8, so I can't comment.
SR: Great if you're making a budget build and you want to soft cap defense, but not much else. I personally avoid it these days.
Ela: Great set to pair with elec melee for theme, as well as combining power sink and lightning field with the end drain properties of your attacks.
Willpower: My personal pick, one of the most survivable secondaries when combined with IO's. Getting near the defense cap in s/l and e/n is not difficult, and you get protection from the exotic mezzes, confuse and fear. It's general lack of defense debuff resistance hurts at times, and without IO's, it's a middle of the road performer in my opinion. No exotic debuff protection like end drain or slows.
For me, it comes down to what you like to fight.
My Elec/Elec Scrapper can take Rikti at plus 0, plus 8, and does respectably well against everything else that I've fought with him.
Add in the heal, and near constant endurance with Power Sink, and you have one of the most fun Scrappers I've ever played.
So, my vote is Elec/Elec. 
On the other hand, if your favorite enemy happens to be other than Rikti there may be something else you'd prefer.
My COX Fanfiction:
Blue's Assembled Story Links
So I'm thinking of making an Electric Melee toon.
I know about the weak single target damage and was wondering which secondary would mesh the best and possibly work out the best with IO's.
I've narrowed it down to Ela, SR and WP. I know shield or FA would be good for added damage but I'm trying to stay away from those for concept reasons.
Any opinions or builds would be welcome.
Thanks