Advice on updating from 11.3 to 12 ???

Looking for advice on updating from 11.3 to 12.

After reading the posts on the stability issues not sure if I should update.
It looks like the update is already available in my accounts.

I have two iloks one currently used for 11.3 The second one never used or activated.
Would it be wise to get a new drive with windows 7 or 8 or 10 on it and then a fresh install of PT 12 and run it with the second ilok?
Not sure if that is even possible.
And keep the old 11.3 on the old hard drive with the current ilok and not run it connected to the web?

Or are the stability issues just another thing that you work your way through and resolve. I have been real happy with 11.3 so far.

Thanks for any advice
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PRO TOOLS 11.3 Focusrite Scarettle 2i2
Windows 7 Intel vPro : 8.00.10.1464
Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
Memory Controller : MSI Core (Sandy Bridge) DRAM Controller 100MHz, 2x 8GB DIMM DDR3 1.33GHz 128-bit, Integrated Graphics
Memory Module : 2 Super Talent SUPERTALENT02 8GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)
Video Adapter : Intel(R) HD Graphics 3000 (12CU 60SP SM4.1 850MHz/1.1GHz, 64MB DDR3 1.33GHz 128-bit, Integrated Graphics)
Compute Shader Processor : Intel(R) HD Graphics 3000 (60SP 12C 850MHz/1.1GHz, 64MB DDR3 1.33GHz 128-bit, Integrated Graphics)

WDC WD5002AALX-00J37A0 (500.1GB, SATA300/600, 3.5", 7200rpm, 32MB Cache) : 466GB (C:)
LaCie Rugged USB3-FW (500.1GB, USB3/SATA300, 15MB Cache) : 466GB (E:)
System Reserved : 100MB (NTFS)
Hard Disk (E:) : 466GB (NTFS) @ LaCie Rugged USB3-FW (500.1GB, USB3/SATA300, 15MB Cache)Hard Disk (C:) : 466GB (NTFS) @ WDC WD5002AALX-00J37A0
(500.1GB, SATA300/600, 3.5", 7200rpm, 32MB Cache)

Advice on updating from 11.3 to 12 ???