Try setting up a RAM disk as scratch. Scratch is where most of your I/O goes when editing, and an SSD can't touch a RAM disk for performance. PS (if that's what you're using) doesn't make much use of RAM above 8GB - it prefers scratch space at that point - so if you partition anything above that off for use as a "disk" you get a huge performance boost.
Having glanced at recent hw prices - for a desktop/workstation I'd say a reasonable baseline for new equipment for professional use would be 128gb ram, 1tb ssd and maybe a 10 tb 3.5 inch HD, if more space is needed (or a smaller drive, but the recent seagate offering looks pretty good value - even if you pay the customary ~2x/gb price [ed: for getting the largest capacity/newest drive on market] compared to a ~4tb drive):
