Why would you want the SLC flash only? The price is too much for a 32gb model. If you look at all the comparison charts the x25m (MLC) has a little bit faster read and it has a sustained 79 mb/s write.
Sure the SLC has a write of 100 mb/s but the intel x25-m still has a faster write time in most cases than even a velociraptor!
Anyways if your reason for an SLC SSD drive is of life span the intel x25-m can write more than 100GB per day for 5 years..
The intel x25-m can clearly last 15+ years for me so life span isnt an issue whatsoever, unless your running a huge server.
All I can say is wow this is the best upgrade I've ever made since 3d graphics!!
Also transfering 4.3gb to my 1tb external seagate hdd from the intel x25-m takes 45 seconds via fw800! Now this is what I call true speeds.
Also my current setup with the intel x25-m is faster in overall OS speed than I can remember with the 2.8ghz 8 core mac pro with 16gb of ram + 150gb raptor drive, it blows the mind!
You may call it luck, but every MLC drive I've bought has failed within months; the SLC drive I got for my tablet is still working very well.