I think you need to ask yourself what you plan on using it for - I will tell you that you can typically buy someone elses toy for cheaper than you can create it yourself. So - if it was me - I'd try and sell yours for as much as possible (2 2.5k seems too cheap) then upgrade to the later model. Save a little money - try and to get them down a little. compress the distance between the two.
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"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower"
-Mark Donohue
