You'll need a lot of drives in a RAID before you see any benefit from
SATA 3.0, and SATA's RAID implementation is still absolute crap
compared to SAS & U320 SCSI. On top of that, reliability issues
are cropping up all over the place with Samsung, WD and other
SATA drives at anything over 7200 rpm, e.g. http://tinyurl.com/26ttv6
and referenced links.
There are no harddrives manufactured with those specs. The Western Digital
RAPTOR harddrives are the only 10,000 rpm drives I believe in production and
they are SATA 1.0.