it's not worth losing all data on both drives when one fails.
Nor to essentially 'double' the read/write usage of both disks.
As I understand it, SSD's have a much shorter half-life than 'traditional, mechanical' HDDs. By setting up RAID 0 or 1 you will essentially have both SSD's writing information in sync. My logic is, if you have both SSD's writing that data when really you only need one copy of that information, then you are essentially 'burning' the lifespan of the other SSD unnecessarily.
If you're looking to Mirror the SSD, My suggestion is to consider alternatives to the way you wish to 'backup' your data.
(If they're new disks, and they're built by the same manufacturer (and likely from a similar batch) then they're quite likely to die within a short period of each other (which makes your mirrored setup seem pointless to me))
If however you want some real 'speed' I'd suggest Striping them, but seriously... I don't see you getting a dramatic enough performance gain to warrant (essentially) reducing the lifespan of thoses disks otherwise.
I opted to use my SSD (120GB) as a 'System disk' and have my previous 'fast HDD' (a 300GB Velociraptor) now set as the target disk for my 'Users' folder (which including 'Desktop').
I've done this so I don't lose any data that I have created (if the o/s disk dies, well I lose the SSD, but all of 'my content' is on the Velociraptor) if the disk gives up the ghost, but I get the performance gain of having the o/s loading super quick.
In conjunction with this, I am running a 'Soft-RAID' (RAID 0 - Striping) in this system also (for my steam folder primarily) which is a pair of 7200RPM 500GB disks that were essentially about to be 'retired' (srsly... who uses a 500GB disk anymore?) so I set them up for striping, and am happy with the performance that these two disks give when paired with the SSD and the VR.
At then end of the day it's your dosh, if you want to go to the top story of your building at hurl the SSD's at the ground, you're entitled to. As for setting up your SSD's in RAID? Consider what you want the RAID for, and whether or not you'll yield any tangible speed gain, or in the case of 'data redundancy' whether or not there are better alternatives.
I say don't bother, there really isn't a need to try and milk the extra performance at the expense of longevity.