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I have a 2500k, I had the money set aside for haswell but decided to wait til next year and get ddr4 at the same time. I mainly just play BF3 and probably BF4 when it comes out so can't see any real benefit with haswell at the moment, but will wait for reviews.
Sticking with my 2600k as well. Not the major improvement on SB/IVB I expected to see from a new architecture.
1 - Buy SSD (right away if possible)
2 - Buy a new GPU in your own time
Enjoy