FYI: You can't upgrade the 2009 MP with a Westmere processor (Hex core, etc.) without first replacing the backplane board and the processor board. These parts will run $650+ so just keep that in mind in case you have plans to upgrade the processor in the distant future.
JMO, but a refurb 2010 base Quad is the best "deal" going for penny pinchers. Plenty of base speed and functionality and a relatively easy upgrade path to the Hex Westmere.
cheers
JohnG