I've been eyeing the m4 for quite awhile but notice the Vertex 3 speeds are quite a bit better. How much more reliable is the m4? Also the price of hte Vertex Plus is very low, how would two of those disks in RAID0 array compare against the other two drives listed.
If reliability and stability is a major concern, then Samsung is worth considering. Samsung was awarded contracts to supply Dell, Sony, Lenovo, Apple and other off the shelf brands with OEM versions of their 470 Series SATA 2 3Gb/s ssd's. Eventually the 470's were released for retail sale to consumers. There have been no major issues reported. The 470 has an absolutely stellar record.
Then Samsung released their 830 Series SATA 3 6Gb/s ssd's as successors to the 470. The first ones were OEM versions for Dell and the other off the shelf brands followed by release of retail versions for consumers. The ssd's are Samsung's own design with their own components and firmware. It looks like Samsung got it right again.
I don't think I've run across a head to head comparison of the 470 and 830. In the technical reviews they are usually compared against other brands.
The major difference is the 470 is a SATA 2 3Gb/s ssd while the 830 is a SATA 3 6Gb/s ssd. In theory the 830 should be a little faster. However in typical everyday use the difference between SATA 2 and SATA 3 drives is negligible. In all probability you would not notice the difference. You'd have to run synthetic benchmarks to measure the difference. This applies not only to to Samsung but other ssd's as well.
In my previous post I provided a link to the ssd database. You can scroll down to the Samsung section and follow the links to all of the technical reviews of the 470 and the 830.