I use KIS 2015 on all my Windows 8.1 installations.Kaspersky does a great job!! However I also like ESET Smart Security and just switched back to KIS a month or so ago
I too have MBAM Premium but I only use it as an on demand scanner.If you have no compatibility issues and it works for you I see no problem.
I would add at least one more on demand scanner such as Emsisoft Emergency Kit and or Hitman Pro
I also like uBlock extension in Chrome.
Very solid config with SBIE!! Thanks for sharing your config with us