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At much lower cost than Apple, with more options.
Lloyd recommends 64GB for iMac or Mac Pro for photography/videography.
iMac 5K vs Mac Pro: Focus Stack (Helicon Focus)
iMac 5K 4.0 GHz, 32GB, 1TB SSD, AMD Radeon R9 M295X 4GB GDDR5 -versus-
2013 Mac Pro 3.3 GHz 8-core, 64GB, 1TB SSD, D700
The two machines tested here are the fastest possible models for this type of work (as of late 2014).
Helicon Focus (focus stacking)
This is a CPU intensive test. The iMac is not as fast, but it’s an impressive showing given that 8-cores of the Mac Pro.
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