Gateway upgrade R77.30 to R80.20, CPUSE or Fresh Install?

[Bob_Delinsky]

Greetings, There are usually valid arguments to be made when you would chose a fresh install vs an in place upgrade via CPUSE from one version to another, depending on the environment, amount of customization made, etc. As far as I've read, gateway appliances do not take advantage of the new 3.10 kernel yet, which would be a Pro for a fresh install. For the jump to R80.20, what are some of the opinions out there? I've tested both in the lab, and have had positive results with both.  Thanks.