Change Hackintosh Serial Number

Hi, so i have been running my Hackintosh for nearly 2 years. Over that time i have added & updated my hardware to get all features of a proper Mac.

My serial number & longer serial board number have stayed the same & my smbios has always been set to a Mac Pro 3,1 With my Native Bluetooth/WIFI Combo card i have had all features working: HandOff, Continuity, SMS Relay, Personal Hotspot etc. So when the new MacOS Sierra comes out my setup will be able to run all of the new features, i have an iPhone 6 & an Apple Watch Sport. The problem is my SMBIOS is Mac Pro (Early 2008) which is not listed as supported, so what would be the best way/process to update my SMBIOS. Ultramixer 2 Serial Number here. I'm familiar with Clover Configurator but what would be the best/ most compatible SMBIOS to choose? Newer Mac Pro? (I'm almost sure to be able to access the Nvidia Webdrivers for my GeForce GTX 960 i have to choose a Mac Pro).

Will using Clover Configurator to change my SMBIOS & serial number then simply doing a reboot be enough or could it cause problems, as in security issues, i remember from the past i did this a few times and in verbose boot it would say about iTunes DRM? I also have the newer 2 Factor Authentication setup on my iPhone 6 & Hackintosh. Should i do a fresh install with the new SMBIOS & Serial Number then pull my user account info from the time machine backup on post install (When setting up a user account)? My specs are below. Thanks in advance for any advice help. MacPro3,1 makes no sense on 7 Series hardware, use iMac13,1/iMac13,2 or iMac13,3 (IGPU only). I agree but with my Graphics card I need a Mac Pro SMBIOS.