At the moment SATA 2/3 drives will always offer the best speed/reliability/cost solution (i.e. all 3 factors tied together, they aren't the fastest).
The best SSD on the market is a PCI-e card and they are very expensive.
Don't forget if you are rich and you want to show off, you can get 4 SSDs at 256GB each and put them in a RAID 10 :P
[Edited by DABhand, 5/9/2012 12:15:51 PM]
mine fail and all file gone.
Use RAID 0 as performance only, like for windows and games
Store your data at another HDD, and not raid HDD
thank u. that was very informative. 4 SSDs in a RAID 10 configuration sounds perfect. i had been mulling that for a while now just wasn't sure if it was technically do-able.