I have Barrys lightning in my garage I rebuilt for him. I strongly recommend going single or if you really want twins then go with at least 2 160s. That way if you loose an engine you can make it home.
With out a doubt single is by far the better way to go for this plane though even Ali agrees that its just allot better way to go.
Also start figuring out a way to work on the plane. Its the absolute hardest plane to handle I have ever seen.
We also question the factory CG. We have removed 3 lbs from the nose and now it fly's OK.
Make sure you get a good gyro. This is the only plane I have dealt with that a gyro is a nesessity