RE: First kit/get back into it plane
Balsa USA used to sell a model that looks a lot like the 4*120. I believe it was a Stingray. But, I cannot find it listed on their kit pages anymore.
It's bigger than your 4*60, but you know what they say--bigger flies better. Your 91 would be a bit small.
If you are going to stick with the 91 engine--the 4*60 is a fantastic kit and I think your on the right track. Perfect 2nd or third airplane. And the perfect plane to get your wings back after a little time away from the hobby. I've built 2 of the 4*60 planes and 2 of the 4*40 airplanes and 1 of the 4*120 planes. The 120 flies the best, but the 60 is a great plane too. I bashed and modified my 40 size planes so much, they barely resembled a 4*40, but they flew great too.
The 4*60 with a .91 4-stroke is just about as perfect a combination as a guy could put together for a nice 60 size sport plane.