Unless you
(a) absolutely need to squeeze every bit of speed
AND one of
(b) don't value your time
(c) don't value your data
(d) backup religiously, every hour or so
or (e) have some other "real" storage, that you temporarily copy files from to get work done quickly
running RAID-0 on your boot or main work disk is asking for trouble. As soon as one disk goes down (and with two disks, your chances just doubled), everything is toast. RAID-0, because of the striping, can be even more sensitive to problems than just using one disk like most of us do.