5D, 40D & Lens or AB Lights?

I have the 5D and 40D. If I had to choose, I would keep the 5D without a second thought.
Elinchroms are good lights. I chose Hensel after comparing, but at that level it's a matter of preferences. The Alien Bees are very good lights and produce beautiful results in the right hands. It all depends on your budget.

This is definitely a tough decision. I will have to talk to my instructors too and see what their opinions are. You guys have been a great help.