Welcome to the ZEVO community!
If performance is a consideration:
Under one of those topics, from
Core Storage encrypted ZFS home in a MacBookPro5,2:
grahamperrin wrote:Whilst performance is reduced by the mixture with HFS Plus (keyword: latency), I am happy.
– so with hardware and a configuration that are more performance-oriented, I guess that you should be
comfortable with 8 GB memory or more in any Mac Pro that meets the
requirements for ZEVO.
Also we have a number of topics about memory. Two points for starters:
I can't predict what hardware will be required for OS X 10.9 but let's assume that the next OS will make better use of resources … so for what it's worth, aim for hardware that might run 10.9.
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I shouldn't take this off-topic but as you're a newcomer to ZFS, some of the following topic may be useful:
Last but not least: when you accept the licence agreement, you get the full installer (not the smaller update). Don't forget to update.