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I'd rather (and did) spend money on genuinely good stuff like MrSpeakers Mad Dogs and Sennheiser Momentums (over ears).
For $50, a timeless favorite is still the Koss KSC-75 and PortaPro.
Data doesn't have to be expensive. I bought a retail Galaxy S3 in Asia (so 2GB RAM + quad core, unlike the crappy US version) and am on AT&T's $35 GoPhone plan with 500 minutes, unlimited text and unlimited data.
That's why people look at me like I'm weird for not liking chess / Sudoku / etc. I've spent enough of my day puzzle-solving already (Scala, Perl, Tcl), thanks very much.
I believe that it's generally accepted that :
Haswell -> 110% IvyBridge -> 113% SandyBridge -> 125% Nehalem
not counting special cases such as AVX2.
Hence, a 4.4GHz 4770K = 5.5GHz i7 920, or ~137%.
If the trend keeps up, we'll get a 1-3% IPC improvement, and even less overclocking headroom with Broadwell.
It's absolutely disappointing that after waiting ~5 years, a fully overclocked 4770K (~4.4GHz) is only 1.37x as fast as a fully overclocked i7 920 (~4GHz).