@korbinbrown the "audiophiles" you contacted were obviously not audiophiles. If your audiophile friends suggested ever using the mic jack for dubbing cassettes, they need to turn in their cards.
There are two problems with using the microphone jack (the pink jack on most PC's)
As a long time live audio engineer, I completely disagree with ever using the mic port on a PC for anything other than VoIP or on-the-spot spoken recordings (lectures, meetings, etc.)
First, the pink jack is monophonic. Recording to that input will give you the equivelant of a 1950's desktop radio.
Second, The voltage level between microphones and line-level devices is very different. A consumer line level device puts out 0.3 to .4 volts at the optimal level .A dynamic microphone generates something like 1 to 2 millivolts, or .002 volts. So a line level audio source is at least 200x more powerful than a microphone level source. This means that the preamp requirements for the two devices are very different, and a cheap microphone preamp is not suitable for line level sources.
Now the rub: laptops rarely ever have line-in jacks. Rather than plug in to the mic-in jack, hop over to Amazon and pick up an inexpensive USB sound card. I suggest something like the Behringer Audio Interface. It's only about $30, and it's purpose built for recording from professional mixers.
In fact, I strongly recommend an external interface if you're going to do any serious recording. The audio interface built in to any PC has to contend with a lot of electrical noise, and I have yet to meet an on-board sound card that has a decent amount of headroom.
I would strongly recommend revising this article and changing your references to the microphone, stating that you should only ever use the blue line-in jack for recording. The mic jack is for cheap, headset microphones, not for recording music.