You have Sandforce based drives, which tend to respond well without TRIM. If you -really- need the transfer speeds of 2xSandforce 2, then RAID-0 without TRIM is still a viable option, especially if it isn't a permanent one. If not, then as said above, just use one drive for your OS now, and split stuff between them.
6D|| 24-105/4L IS USM|100/2.8L Macro IS USM|Canon 70-300/4-5.6 IS USM|24/2.8 IS USM|40/2.8 STM|50/1.4 USM|85/1.8 USM|
60D||15-85 F/3.5-5.6 IS USM|