Yes, I mis-described the RAID. It is RAID 1, a pair of mirrored disks.
Your "unasked-for opinion" was exactly what I was interested to hear.
A more knowledgeable (more knowledgeable than me) hardware person had asked "why did you do raid 1 and not raid 0, those drives won't fail?" Answer: this is an important machine, I want to always have a current back up (data drives are mirrored 1TB spindles).
One disappointment is that my C drive is nearly full (220/256 GB) on Windows 7. I didn't anticipate this 12 weeks after deployment. Another factor is that I thought I was buying the biggest consumer SSD drives available (Agility 256). Don't know if they were available at the time, but I see much larger drives now.
So, I think I will simply live with the system as it is. I'm particularly compelled by your skepticism about striping. So I will put that idea out of my head, thus eliminating the prospect of losing my entire system by trying to get an extra 220GB.
Thanks.