Hello again,
You can see many transients by turning the room lights down and setting the scope trace on the brightest level, setting the trigger level, then initiating the startup sequence (as in turning on the power). Again, 20MHz min bandwidth and fairly new scope (old one might have lower level phosphor).
I only needed a storage scope once when trying to find out the current during a line tie operation with a converter running off of a large solar panel and supplying power back into the line. True though it would have helped other times too, but it wasnt that often when it would have made a difference.
The choice is really up to you.