The fastest stuff around
DDR3-1,800 (PC3-14,400)
High speed and high prices
2GB kits (2x 1GB)
OCZ Gold Series - 9-9-9 latencies - XTC heatspreaders - 1.8V - £90.34 @ Ebuyer.co.uk.
4GB kits (2x 2GB)
OCZ Platinum - 9-9-9 latencies - XTC heatspreaders - 1.9V - £186.34 @ MemoryC.
DDR3-1,800 kits are now half the price of three months ago. 4GB kits have slowly started cropping up, and the OCZ Platinum offers by far the most value.
DDR3-2,000 (PC3-16,000)
DDR3-2,000 remains the domain of the enthusiast that isn't interested in value for money. The super-niche product is validated for NVIDIA's nForce 790i Ultra chipset (EPP2.0) and used to promote the ability of the manufacturer to keep up with the latest technology.
OCZ Platinum - 9-9-9-28 latencies - XTC heatspreaders - EPP2.0 - 1.8V - £122.96 @ MemoryC.
4GB kits (2x 2GB)
OCZ Platinum - 9-9-9-28 latencies - XTC heatspreaders - EPP2.0 - 1.8V - £224.18 @ MemoryC.
It's interesting to note that OCZ kits are significantly cheaper than other vendors'.
Summary
We've also seen the emergence of 8GB kits in the last three months, although, for the most part, they're simply four 2GB modules packaged together, rather than two 4GB sticks.
The pick of the bunch is the 4GB DDR3-1,333 kit from Corsair, currently priced at £114.70. However, it's still comfortably over 2x the price of quality DDR2-800 and cannot be recommended for any system costing less than, say, £500.
We should see DDR3 sales increase with the introduction of Core i7, and we expect to see a slew of tri-channel packs from all and sundry.
As it stands, the speed benefits of DDR3 are still outweighed by the cost; we'd rather but the extra money towards a larger hard drive or better graphics card.