I've recently begun my adventure into the world of high fidelity listening. While I don't exactly have golden ears, it appears I can differentiate recording qualities to a small extent --about 66% of the time-- according to an NPR listening test. A few years ago, I received a pair of open-back Sennheiser HD558 headphones. I didn't know what these were for at the time. They lacked bass and everything sounded flat. A mistake? No! It was then I read that they were meant to play music this way, without meddling with equalization. I was getting a more natural sonic experience. A few days back, I stumbled upon an unbelievable deal at a garage sale -- a Bose SoundDock Portable for $4. At that price, I assumed something was wrong but tried it anyway. It was perfect. The owners just wanted to free up space and already had a bunch of Bose gear. The SoundDock sounds very good and now I play a lot more music when I'm home. However, i have concluded that while this system is a significant upgrade from the no-name Bluetooth speaker I was using, it is a bit heavy on the bass side, even with flat EQ. Thus began my quest for a system capable of reproducing sound with less artificial and more natural flavoring. I'm in the process of overhauling my library. Though I won't claim to hear all the minute differences, nor do I ever really expect to be able, I am replacing the majority of my library with higher quality rips -- 128 kbps AACs/mp3s/MPEG with 300+ kbps lossless AIFFs -- and taking advantage of this 160 GB iPod I own. Reason being, a lot of the music on my phone was ripped in its most compact state: 128kbps mp3 files. I want to see how listening to lossless affects things. So, anyone else here doing the HiFi thing?