I think that arf is a great idea, I was thinking about picking up a corsair or a p-47 myself to get some warbird experience, I;ve flown lots of planes but mostly sport models or high wing scale planes. I was looking at the kmp line of arfs we'll see how the finances go?
I think I am going to go with a smartfly power expander system and use two 2 cell lipos for batteries just have to figure out how to fit everything. here's a link
http://www.smart-fly.com/Products/Expander/expander.htm