+1 for the upgrade and clean install of Windows 10.Look around as there are some very easy settings changes to get rid of some of the telemetry but all in all I think you will like 10
Appguard and WinAntiransom are very good programs combined with Kaspersky and the security of Windows 10 I think you have yourself a solid config!!
Kaspersky has become progressively lighter with each release especially boot times. Kaspersky 2017 is due for release around the end of July.
Off topic:
As for the AV/Security suite debate I always stick with what works for me,meaning if you have stayed infection free for any length of time why change what works for you.Of course malware is ever changing but so is the AV software.
I have always used an AV/Security suite and I have not had an infection for well over 15 years.
Personally I haven't used Avast for a very long time and was given an Avast IS license by Avast to test and I must say it is a very good program and does very well in detection.Personally I think much better than in years past.
A lot of factors go into a config so there is no right or wrong but just what works for you on your machine and what makes you comfortable.
Operator error,if you will,accounts for the majority of infections