The SSD can always go with you to the next build. I still have the very first SSD I ever purchased doing duty in one of my boxes.I have one but it's just a 256 GB Crucial m4 for OS and apps.
Edit: Don't really want to do any sort of upgrades or changes to this current PC anymore. I've had it since January 2012 and it has stayed the same since other than some upgrades like GPU. Much rather prefer to build a brand new PC next.