builderbobftw, here is something that I like to throw in.
The more recent pre-built systems are plagued with problems! I found myself repeatedly contacting tech support and each instance took quite a bit of my time (as well as theirs). After about 2 or 3 attempts to resolve the issues, they suggested re-installing Win XP. This re-installation is from a re-installation disk supplied by the computer manufacturer with their own add-ins that is usually the source of the problems.
Therefore, even after re-installing Win XP, I end up with the OS which includes add-ins from the computer manufacturer. Everything works fine for a few days, and then we are back in the quagmire of problems. And the cycle repeats.
I found it insane for me to keep doing the same things over and over, and to expects different results.
This was what made me look into a new build to my own specs. For the next 3 months, I read tech articles, component reviews, listened carefully to answers, and came up with a set of new build specs.
I made some real good buys on Black Friday 2009! The system assembly went well (I followed directions), and started up the new system during the 1st week of Dec 2009. The system worked, and is still working, flawlessly.
This encouraged me, and I looked into overclocking. Another week of reading instructions mainly on this site, and I was well into OC. Now my i-7 920 2.66 GHz CPU is OCed to 3.81 GHz as I am posting this.
Bottom line: Flawless computer performance since Dec 2009 build. This is worth something to me in time savings stemming from the tech support that I don't need anymore. Tom's Hardware is the place I go for tech help. Thank you.