The X25-E saturates the SATA 3.0/II bus at 270 reads per second and 210 writes (according to a quck Quickbench). I know that it is saturating the bus because it reads consistently at 270 MBs from 2MB to 100MB. It reads (and writes) 1024K blocks at 243 MB/s. The XBench disk test = 348.99, full test = 253.57: http://db.xbench.com/comparesubindex.xhtml?machineTypeID=40&sort=score&minVersion=1.3 Just got my 17" 2.93 (glossy -- not bad) today and threw the X25-E in quick and 8GB of RAM from OWC. So far I couldn't be much happier.