If you need to combine both drives to see a larger system image, then ok. I did that with two X25-M g1 80gb drives.
If you think you are getting better performance, then you might rethink your strategy.
Synthetic benchmarks operate at unrealistic queue lengths(like 32) for the normal desktop user. They measure MB/sec and iops, neither of which we care about. They are used for marketing hype. What we care about is how fast we can apply patches, upgrade to sp1, or retrieve a web page. If you are a gamer, level loads. The reality is, that AS SSD benchmarks show that all SSD's have similar random response times, and that is what is most important.
By using raid, you forgo using trim to keep your ssd clean, and quick to update.
Your synthetic benchmarks look impressive, but bear no relationship to your actual user experience.
We rarely do lots of sequential operations, where raid-0 may be of benefit. What the OS does mostly is small random reads and writes. A task that the SSD does very well.
I changed from two 80gb gen1 drives to a single gen2 160gb drive using AHCI and TRIM, and got the same subjective performance. If anything, it was a bit better.
I have come to the conclusion that most SSD's will give the user the same performance. The caveat is that the drive be somewhat current with well developed firmware, like the Intel ones. As an early adopter, I upgraded to the Intel 510 120gb using 6gb sata. Performance is still good, but not noticeably better. In retrospect, I should have gone with the 160gb 320 drive instead.