RE: New Plane, Which Engine?
Go with the Saito .91. Saito 4 strokes are very reliable and smooth, lighter then the OS .91 too. Saito is a good brand, user friendly, great quality, reliable, and good power.
I think the .91 is a good size to get too, it seems like some people with the .72 wish they had a little extra power...and I've heard that the 1.00 is too much, and they never really use it to its full potential...and if thats the case, you might as well save some weight and get a better fit under the cowl with the .91. Definitly get a four stroke, trust me, you'll be happier with it, most people are when they switch over.
Hope this helps...[8D]