Pros: Lightning fast for gaming and moderate desktop programs. Unless you are going to be utilizing heavy editing software, this is your best bet to an i7. I have a liquid cooler, albeit small, the H55 and my temperatures average around 45 celsius under load. Also, my chip is beautifully overclocked to...
Pros: If you don't have the extra money for an i7 this is certainly a great buy. I play lot's of CPU draining games and I also stream and this processor does just what I need it to. I have read the review on the stock fan and although I have not overclocked yet I haven't experienced any issues.
Cons: Although I swear by Intel you could certainly acquire an AMD that is just as fast and strong for less.
Summary: Noctua has a new line of CPU coolers that are made for smaller cases. Originally I got the Cooler Master Hyper 212 EVO, super highly rated cooler, but it did not fit in my Corsair 250D. The Noctua NH-U9S fits like a charm, and has all the awesomeness that Noctua is known for.
Pros: excellent value
Cons: OEM cooler sucks. Nothing new there. Try: 117F vs 97F. Big difference if you're going to do any over-clocking.
Summary: I was lucky enough to not buy this for me. This was for the mother in law's new computer, but while I had it sitting there, I benched it against my Sandy Bridge 2500k - and it was about the same. on average 3-5% was all you see out of the newer chip.
Pros: Nice chip with mediocre integrated video.
Cons: Not really an upgrade from the Sandy Bridge era chips.