High-memory servers for bioinformatics / metagenome assemblies

I want to get a 512Gb RAM machine for bioinformatics, specifically for doing metagenome and large genome assemblies. For some good background on why a server like this is a good idea (as opposed to, say, a cluster) check out Jermdemo's post on Big-Ass Servers(tm).

512Gb machines are now fairly easy to source, you just need something with a motherboard that will take 32 DDR3 chips and then fully populate it with 16Gb chips.

If you guys help me source some options in the comments section I will maintain this page with links to available systems. Seems like it's possible for <$8500.

Chassis

• Supermicro 8016B-6F (1U), $2995  - barebones
• Supermicro 8026B-6RF (2U), $3663 - barebones
• Dell Poweredge R910 (4U), $5714 - basic spec (8 cores)
• Dell Poweredge R815 (2U), $2799 - basic spec (16 cores) - HT Peter Cock

Chips

• UK Google Shopping Link for 1x16Gb DDR3 chips
• US Google Shopping Link for 1x16Gb DDR3 chips
• KVR1066D3Q4R7S/16G, $344.89 ea.
• 16GB Kit 1X16GB Dell DDR3-1066 PowerEdge R610 R710 $341.98 ea. ($5471.68)
• Kingston KTM-SX310Q/16G $380ea.