Which CPU is more future proof?

[CropDuster]

I would stick with the Westmere but I am biased. However, X58 components are going for stupid money on ebay now so it may be a good time to get out of it, but I'd only replace it with X99.

 

[DrMrLordX]

If all he cares about is single threaded performance he should buy that unlocked HW celeron. It will be much faster that that locked I5.
UPDATE: I meant Pentium.

He's got an i5-4690k now. The G3258 isn't going to be better than that.

Westmere not exactly obsolete...and its not just 6 cores vs. 4, its 12 threads vs. 4...and its 12 overclocked vs. 4 locked...

See above, his cores are not locked now.

 

[Hi-Fi Man]

DrMrLordX pays attention!

Had I not came across this deal I probably would have stuck with the Xeon but definitely missed some of the platform features. One very important application for me would also lose performance with the Xeon, Dolphin, this emulator actually utilizes AVX, FMA3, and some BMI instructions in it's JIT and other areas so Haswell indeed has a major advantage in Dolphin.