I'll tell you the problem I have with people saying they "would never buy online music until it's provided in a lossless format".
You've been buying music in a lossy format for over a decade. The sampling done to make a CD is lossy, and can introduce some awful harmonics. Fortunately it's too subtle for most people to notice.
The TTL circuits that are probably used in your amp / stereo system (unless you have vacuum tubes) are lossy. They are again sampling and reconstituting the music, creating some awful harmonics.
Heck, odds are the amp used when recording the music was digital. Guess what?
It's not a question of "lossy" vs. "lossless". Everything we are sold is lossy. Walk into a music store and buy a CD, it's encoded in a lossy format. That's okay though, because even if it wasn't your amp will re-encode into a lossy format.
The question is how much are you willing to accept, based on the style of music you listen to and how well attuned your ear is to specific harmonics?