Some reading for you.
SSD Maintenance
You won't gain much if anything from RAID other than larger volume, in which case a 240GB Samsung 840 would make more sense, and does on another of levels. You are better off using a single SSD and use another drive for other purposes. OS X with lots of small frequent IO requests works great on single SSD or any drive for that matter.
Sonnet Tempo Pro vs OWC
http://forums.macrumors.com/showthread.php?t=1552592
Other topics on SSD, RAID etc
http://forums.macrumors.com/showthread.php?t=1605876
http://forums.macrumors.com/showthread.php?t=1606023
Adding 1TB of SATA3 SSD with Apricorn and Highpoint RAID to my 2009 MP (photo writeup)
http://forums.macrumors.com/showthread.php?t=1504491
SATA II for a single SSD is fine but you don't gain much from using (wasting) two drive bays.
Use a PCIe SSD card. To use as RAID and get maximum performance there are two choices, Sonnet Tempo Pro card or it seems there is another but haven't read or gotten mine enough yet but a review is on MacRumors.
TRIM only works in non-RAID usually. Check with card manufacturers.
Adding 1TB of SATA3 SSD with Apricorn and Highpoint RAID to my 2009 MP
http://forums.macrumors.com/showthread.php?t=1504491
Real world experiences with Sonnet Tempo Pro and 2 Samsung 840 Pro SSDs
http://forums.macrumors.com/showthread.php?t=1605500
Icy Dock $15
http://www.amazon.com/2-5-3-5-Ssd-sata-Convert/dp/B002Z2QDNE/
Before you clone, install TRIM Enabler!
And after you clone, run Disk Utility's REPAIR DISK on the SSD -- just to be on the safest side.
http://www.macupdate.com/app/mac/37852/trim-enabler
How to relocate system and user data to another drive:
http://support.apple.com/kb/HT4337http://chris.pirillo.com/how-to-move-the-home-folder-in-os-x-and-why/To successfully relocate your operating system, user accounts and data from one storage device to another, meet the following conditions:
The destination storage device (SSD drive or hard drive) you are migrating to should be physically located in the same computer. Moving operating system files from one computer to another computer using software not specifically designed for that computer can cause issues due to software, hardware, and firmware version mismatches.