All three processors will be "bare" - non-retail, new, and unsupported w/ no warranty, but guaranteed genuine tho possibly non-standard. The QX9650 is reported as possibly a problem child - motherboard compatibility is not guaranteed.
I do very occasional gaming, some work-at-home VPN'd into my work machine, and mostly email/internet. My P4 mobo/processor/PSU are fried and I'm looking to re-build, using as much as I can. (See thread here for details on what I've got that I'll be re-using.)
My current (dead) system always seemed to have heat issues. The processor may have been a "problem child" processor or the temp may have been reported wrong. Regardless, I don't want heat issues! Ambient is 82ºF (28ºC) this time of year (Phoenix, AZ). I don't care a whole lot about O'Cing, but might fool around w/ it if it's just a matter of software tweaks. Plan on using a good aftermarket CPU cooler, and if you read the thread I linked to above, you'll see my proposed system(s), my fan setup on the current system, video card, etc.
So... Which one should I get? I'm leaning toward the Q9450 because of concerns about heat issues w/ the QX9650 coupled w/ the fact that it is reported as a non-standard CPU w/ possible problems. I don't need/want problems. I just want a stable, reliable, zippy-fast system I can ignore for years and run 24/7 that will hopefully last through Windoze 7 SP1... 'Til Win7 SP1 is out, I'll likely run XP Home.
Thanks, B-Unit. Yeah - they'll all cost me the same, but I was scared of the disclaimers that came w/ the QX9650, so I went w/ the Q9450. I'm sure that will more than meet my needs for a long time. Now to get all the parts in my hot little hands and build it...