The most important figures there are 'Average Read' and 'Random access'
To cut the long story - A decent SSD like the Crucial C300 or OCZ Vertex 2E will KILL your current raid setup.
C300 has read speeds of over 300 Mb/s! and Random Access of less than 1ms!
...and to give you a bit more of a comparison, just HOW FAST SSD's really are - I have two 150Gb Western Digital Velociraptors (10,000RPM) disks in a RAID 0 setup.
My Average read is 178Mb/s and Random Access is 7.2ms