Provided you have a fast CPU, the drive is likely to be the limiting factor. SSDs are fantastic for processing large data files (which don't need much CPU power). E.g. redubbing audio into HD video files, unraring, PAR checking (not so much repair as that needs loads of CPU).
Before I got my SSD, I would have to put the original video on one hard drive, the audio on a second, and then the processed file on a 3rd drive - otherwise, the drive would be thrashing like mad, and progress would be terrible.
Don't worry about wearing out your SSD. The wear-out issue is blown out of all proportion. I've been regularly doing 10 or 20 gig file runs on my SSD - typically I do about 20 gigs of writes per day. My Intel drive is now 2 years old, and SMART is saying "98% life remaining". Tests by people deliberatly setting out to kill SSDs suggests they typically last about 5x their life meter.