You should enjoy this build !
The Top Flight kit is a good one, and the built model flies extremely well..
A friend has one, powered by a G-38. I've flown it, and I really like it. The G-38 would be my suggestion for power.
The version that you have selected, is an SR-8. Your kit is an SR-9, so the windshield area will need modification, if you decide you want to go that far. Most people will never notice the difference, however.
Your chosen lighting system looks interesting. I have never seen one in person. I've been using a light system from Electro Dynamics, which works vary well, although it is more expensive than yours. http://www.electrodynam.com/rc/EDR-117/index.shtml
I hope that you enjoy this build. The Stinson SR is a beautiful aircraft. I will eagerly follow your progress.
This is my SR-8, built from an IKON kit.