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About $20 more expensive than the Crucial M4 at B&H, but the Sandisk one seems to be quite a bit faster (especially in terms of write speed). Should be worth the $20 extra I reckon.
Info from B&H:
Fast Load Times for Demanding Applications
From boot-up to shutdown, the SanDisk® Extreme® Solid State Drive offers exceptional performance with sequential read speeds of up to 550 MB/s and write speeds of up to 520 MB/si. You will experience fast load time, less lag time, and rapid response for gaming and other graphics-intensive applications.
Cost-Effective and Energy-Efficient
With SanDisk® Extreme® SSD, you can simply replace your old hard drive and boost your computer performance rather than buying a new computer. The Extreme® SSD stays cool and quiet during operations and consumes less power than traditional 7,200 RPM hard drives** so your battery lasts longer.
Compatible with Most PCs and Laptops
The SATA 6 Gb/s SanDisk® Extreme® SSD is backward compatible with SATA 3 Gb/s and SATA 1.5 Gb/s. It works with any computer that has a 2.5-inch hard drive.
Rugged Drive Engineered for Reliable Operation
Built with no moving parts, the rugged SanDisk® Extreme® SSD is both shock and vibration resistant for reliable operations. It is rated at 2 million hours Mean Time Before Failure Δ (MTBF), so you can depend on it as a long-term upgrade solution.
for those in melbourne, cheaper to walk into a shop and buy.
http://www.scorptec.com.au/computer/45904-sdssdx-240g-q25
there's probably similar pricing in other states/territories…