Why do RAID 0 or 1 inside the same computer using SSDs? RAID 0 strip will likely not give you any faster read/write speeds but the full storage capacity of both drives. And if you lose one SSD, you have lost the entire volume until you replace the drive and restore from backup. I don't see any business case for this approach.
With RAID 1 you get high availability so that you should be able ti still work if one drives bites the dust. But RAID 1 is by no means of still having backups outside the computer....ideally in a Time Capsule or a NAS where it is less vulnerable. Given that an SSD has no moving parts, I don't see any business case for a RAID 1 configuration inside a MBP.
Suggestion: save all this SSD money and put it on a new rMBP. Either get a refurbed one with warranty....you can get $500 off compared to a new maxed out rMBP. Or just wait for the hardware refresh that should be announced in Sept. In any case, get with an all solid state machine with TB2, AC wifi, and energy efficient CPU and chipset.