John,
In addition to the Brodak electric systems, you may want to look at the excellent high quality "Hacker" electric system from Eric Rule at RSM. Eric's system is a true "Turn Key" complete ready to fly electric CL power system that uses the very high quality, reliable Hacker motor and ESC with a Hubin Timer, along with one of the best batteries available, Thunder Power. It is designed to power any of the common size CL planes in the 500 sq. in. to 600 sq. in. area wings. This covers the vast majority of CL kits, plans built, and ARF/ARCs available. The nice thing about Eric's system is that all the settings are preset for you to help you get in the air with electric power right out of the box. His web site is:
http://RSMDistribution.com/index-2.htmYou can also get a very good, well tested, electric CL power system form Randy Smith. Randy also designs and sells some of the most successful and beautiful CLPA planes available. Randy also makes some of the best wet power engines in the world. They are very powerful, reliable, beautiful to look at, and built to the highest standards. It is nice for us that Randy also sells CL electric power systems. :-) .... Here is the link:
http://www.aeroproduct.net/The above will get you equipment that is set up for CL. I highly recommend that you start with one of the above three distributers, they understand what is needed for electric CL, and their systems have been well proven in the electric CL community. AFTER using one of these, and you learn more about ECL, then there is the entire world of electric RC systems to choose from if you want to experiment on your own.
Please don't forget to go to the top of this section and click on the sticky to see what others are using for a similar size plane to yours. I'm sure one of the above three suppliers will provide the equipment you need.
Don't worry, your transition to ECL will be easier than you thought. There is plenty of help available from the above three suppliers, and here on Dean's excellent forum. Welcome to the wonderful world of electric power.