Hi AoW! You seem like a nice guy, so a note about temperatures...

While I have the "run it till the wheels come off mentality" myself (my personal car is ten years old and my main work and networking puter for the house is 7 years old), I build computer systems for fun and have up to 5 other puters running in the house at various times of the day. If I burn something, I have other machines readily available to me, probably have spare parts in the closet and can fix it when convenient and consider it 'a fun time'. As Whacker said it more humorously, if neither the knowledge or will to spend the money is in you, do as you now do, be cautious...however...

I want to second his recognition of the extrordinary environmental conditions you apparently consider to be normal for computer operations. Doing ANYTHING in a room where temperatures are in excess of 100 degrees for twenty hours, while very 19th-century of you, is something I would not recommend for you or your machine. I would consider it much more problematic than say leaving the disc in or the game running for an hour or so...
You write
"Further, if the temp outside is 100 degrees- well come on, I mean PC makers can't be expecting people to not use their PC because the weather got warm. In my eyes, if my PC usage would need to be restrained according to the weather- well then my PC is just going to die an early death."
You are quite right in two senses, ergo; PC makers do NOT expect you not to use your computer because the weather warms up, they expect you to use Air Conditioning!, and if you don't, ceteris parabus, your machine will most likley experience problems under the conditions you mention earlier than would otherwise be the case. I am very glad to hear you have now installed AC, but just for the record as a system builder I would not recommend using your machine in a room over 100 degrees for prolonged periods- or at all, nor would I recommend playing on the front porch, or in a rain storm, dust storm or in any other way in which the local ambient weather, humidity, or fauna could get at your puter.

PC makers aren't weenies... well some are, but that's beside the point - experience with the hardware makes us say stuff like "do not mix keyboard with coffee, sugar and cream", or "air cooling is more efficient with cool air". May The Prophet grant good luck with your new system and I hope to hear what your rig is!

AlJabberwock