Welcome to the game, Cnorwood!
Dual Pistols is fun and Electricity Manipulation is a great secondary set. And combined, they can be very potent together.
/Elec leans towards you being in melee: 7 of your 9 powers are melee or PBAoE powers. And DP's big power, Hail of Bullets is one big fun and damaging PBAoE. So.... you're going to want to build your character for surviving in melee range to get full usage out of your powersets. So I hope you don't mind getting up close and personal with your foes!
Picking up Tough from the Fighting power pool will help and if you can fit Weave into your build, that's good too. Combat Jumping is good for immobilization protection (and some defense) and Acrobatics (also if you can squeeze it in) gives some hold protection and Knock Back protection. There are also IO enhancements that grant KB prot too. And certainly pick an APP or Patron Pool and take one of the various shields offered to stack with Tough/Weave/set bonuses. Maneuvers from the Leadership pool can help as well. And you're going to want Hasten.
/Elec also has a big advantage and that's Power Sink. It's auto-hit and recharges in 60s base. With Hasten and moderate set bonuses, you can get Power Sink to recharge in ~30s. Only downside is that it has a 12ft range so you have to be close. But with full slotting, you can fill your end bar off only a couple of mobs.
For set bonuses, you'll want to build for max HP; decent +Recharge to get HoB, Power Sink, and all your other attacks back faster; +regen and +recovery; and finally, as much +defense as you can get. Mids' Hero Planner can really help out with this. You can get it from the Titan Network: http://www.cohtitan.com/
DP/Elec can be a beast of toon and you should have fun playing it. All the powers in both sets are good and have thier uses, imo. So you'll have to take/drop what is important to you and your playstyle.
Again, welcome to CoX and have fun!! 
New the the game, and just wanting some input in this combo class that I am using now.