Its an odd problem. Here's a few guesses that you may want to look at. First, is your room symmetrical? For example, is 1 speaker is close to a corner and the other speaker near a space that opens up, like a hallway? Something like that. I would also try swapping channels on your Apple TV. On the back of your preamp, unplug the IC's and reconnect them the other way. Once you do that, listen to the system and see if the problem follows the IC's to the other channel, or is the problem still on the same channel?
If that doesn't work, check your music player and OS settings and make sure all the settings are correct. Balance, EQ, that type of thing.
"I'd also like to know if there is a good way to use a decent CD player to import lossless files to iTunes. "
That's not necessary. Use the drive in your PC. What I would recommend you do, though, is not use iTunes to rip. Download a free program called EAC and install it. Use that for all your rips. EAC has a lot of options, and it can be difficult to use. Search for EAC set up guides. There's a few good ones out there. (If I remember correctly, the best one is on Blowfish). The setup guide will walk you through the setup process to get the best quality rips. Once you set EAC up for the first time, its easy to use after that.
If that doesn't work, check your music player and OS settings and make sure all the settings are correct. Balance, EQ, that type of thing.
"I'd also like to know if there is a good way to use a decent CD player to import lossless files to iTunes. "
That's not necessary. Use the drive in your PC. What I would recommend you do, though, is not use iTunes to rip. Download a free program called EAC and install it. Use that for all your rips. EAC has a lot of options, and it can be difficult to use. Search for EAC set up guides. There's a few good ones out there. (If I remember correctly, the best one is on Blowfish). The setup guide will walk you through the setup process to get the best quality rips. Once you set EAC up for the first time, its easy to use after that.