2500k is 3.5 years old and the 2nd gen i5/i7 is where there was a reasonable jump in performance over the 1st gen i5/i7.
The i5 750 is still a reasonable CPU though and getting a GTX 270 is well worth it. Some games like BF4 that can use 4+4 hyperthreading is where the newer CPUs will show their performance.
As already mentioned it's also the extra chipset features on the newer generations that make them worth looking at, but only if you need them.
The i5 750 is still a reasonable CPU though and getting a GTX 270 is well worth it. Some games like BF4 that can use 4+4 hyperthreading is where the newer CPUs will show their performance.
As already mentioned it's also the extra chipset features on the newer generations that make them worth looking at, but only if you need them.