Hm... to tell you the truth I expected some thing more for read & uncached write.
For example ~100MB/sec for the read and around 40+ for the write.
Since you have a version after 5.0.4, have you tried the optimization mentioned at
http://lime-technology.com/forum/index.php?topic=5754.msg289252#msg289252
http://lime-technology.com/forum/index.php?topic=31042.msg279810#msg279810
(enabling some kind of write option) to increase your write speeds.
I am asking all these questions because I will have the same setup (without the SSD) in a few days and I am bit disappointed by the write speeds that you mention (30MB/sec)