"Bristol_Jonesey"
I'd simply wait for X2 AND your new SSD and do it once, and once only, without any heartache or potential for Murphy's law to kick in.
Wise advice. My OS and audio apps. have been installed only once, about 14 months ago. There is no degradation of performance and my audio-only system is basically locked down now. Meaning, aside the installation of a new plugin once in a while, no changes are being made.
Just make sure to install the latest firmware for your SSD (if need be) and follow the installation instructions especially if it's an OS drive. For example, use "quick format" only (4k cluster size - default) etc. As you wait for your SSD to be delivered, you have an opportunity to take the time to find out how to do it right the first time around. Good luck!