Thanks to azwccc @ bitcointalk
Prebuilt Systems can be found here: http://www.portatech.com
Complete Barebones System w/ Core i7 4770 @ 4 x 3.9GHz
Intel Socket 1150 Motherboard & CPU w/ CPU Fan Heatsink
2 GB RAM
High Quality Mid Tower Case w/ Power Supply
Free Professional Assembly & Testing
USB Flash Drive with Linux for OS + MinerPrice Of Advertised Item: $414.93 -- FREE Assembly & Testing Included
Thanks to MineMind @ bitcointalk
If you would like to build your own: http://pcpartpicker.com/p/1W43u
Intel Xeon E3-1220 V3 3.1GHz Quad-Core Processor
MSI H81M-P33 Micro ATX LGA1150 Motherboard
G.Skill 2GB (2 x 1GB) DDR3-1600 Memory
HEC Enterprise MicroATX Mid Tower Case
Raidmax 450W ATX12V Power Supply
USB Flash Drive with Linux for OS + Miner
Total: $348 after Discounts, Rebates.
Some things to note about these systems.
1) No benchmarks have been performed using our mining algorithm
2) The initial ProtoShares-Qt client requires about 1 GB per core, in theory enhancements to the algorithm should allow 1.5 GB to be used with any number of threads. Until someone contributes an enhanced mining algorithm to the ProtoShares client you will require about 12 GB of RAM
3) The Momentum Proof of Work is memory bus limited, having 2x1GB DIMMS may be better than 1x2GB DIMM.
4) These systems assume boot from USB stick running Linux. You will have to build ProtoShares from source to mine on these systems until someone releases a downloadable USB drive image.