Are you wanting to go to an LED bar because you're tired of the "bug eye" look of your PIAA's...or is it your PIAA's don't put out enough light and you're wanting something brighter?
The reason I ask is....if you're wanting crazy bright light....and don't mind staying with 7" round lights...then go with ARB's new LED 21 Intensity lights. As with anything that has ARB's name on it...they're expensive (roughly $500 per-light) but also, if it has ARB's name on it....you know it's going to be of high quality, built to last, and do what it's suppose to!! You can go to Utube and see how frickin bright these lights are. Talk about turning night into day....Wow...these lights will do it !! They come in a flood light and a spot light.
http://www.arbusa.com/uploads/PDF/newProductAdvice/2014/AR21_Retail.pdf
Anyway...that's what I'm saving my pennies up for. If you're going to do it...you might as well do it right the first time!!! I hope this helps you Sir...
Edit: Wow...I started looking around ARB's web site...they now have 32 Intensity LED. These bad boys are 9.5" round LED's. At the bottom of the page...they have a Utube video using two lights...just incredible how bright these are. Oh yeah...bigger means more money...around $750 per-light...ouch!!
ARB Intensity 9.5" LED Driving Lights - Spot Beam (AR32S)
Good luck Buddy
-Russel