ddr3 prices are dropping every week lately in Australia
some bargains (well in my opinion) which you can buy right now are
Corsair TR3X6G1600C8D 6GB (3x 2GB) PC-12800 (1600MHz) DDR3 For X58 MB/i7 Core, 3x240-pin DIMMs, Triple Kit, 8-8-8-24 1.65V (Stock:>5 ) AUD$333
Corsair TR3X6G1600C8D 6GB (3x 2GB) PC-12800 (1600MHz) DDR3 RAM, 32x240-pin DIMMs, Triple Kit, N AUD$335
Team Xtreem Dark 6GB KIT (2GBX3) DDR3 1600MHz CL8 PC3-12800 AUD$330 probably Micron D9JNM based
Team Xtreem 6GB KIT 2GBX3 PC3-15000 DDR3 1866MHz CL9 AUD$395 - most likely Samsung HCF0 <-- tempted to get this kit heh
G.SKILL F3-12800CL8T-6GBPI-B 6GB DDR3 3X2GB DDR3-1600 8-8-8-21 AUD$417 - Samsung HCF0 based <-- tempted too
KINGSTON 6GB 2000MHz DDR3 Non-ECC CL8 DIMM K3 XMP TALL HSUL AUD$498 - not in stock most likely Elpida 50nm Hyper ic based like a kit i got but I paid AUD$550 for
Still testing....
Shame don't have $$$ or I'd try them all
Or take a gamble on Transcend Value RAM DDR3-1333 with possible Micron D9JNM
Impressive Great For Value Transcend DDR3 Value rams ! List price here in OZ ~AUD$145-168!