Tweaking SSD drives for less wear seems to be all the rage nowadays. On that subject is Write Caching still relevant on SSD drives? Does it make a difference if it is turned off?
Assuming you aren't going to be hot-plugging drives, write caching should still speed things up, because writes are cached in main memory - SSDs are fast, but not as fast as RAM.
More information on how write caching works: http://www.pcguide.com/ref/hdd/op/cacheWrite-c.html