New
#11
The Classic Shell Start Button is dynamite on Windows 8. You don't need it on 7.
I have XP, 10, and 8 on separate partitions on the same computer, and they all work well. I upgraded 7 to 10 because I wasn't using it anymore. I see little benefit in installing a legal copy of 7 on your other SSD, plus backwards installations usually don't work well. The architecture for Win 7 has been improved so heavily by now that I doubt that Win 7 will run well on your rig.