Intel 320 Series SSDSA2CW160G3B5 160GB SATA II MLC Internal Solid State Drive for $154.99 shipped after this $100 rebate.  Here is a screenshot for reference.  It features up to 270 MB/s read speed and 165 MB/s write speed, redundant NAND storage, and file write protection during power loss.  Most places have this SSD for about $289 or more.