OK What's next with my iPod?

So, I've got an iPod Touch with many uncompressed CDs on it and it sounds surprisingly good through my Sennheiser headphones.
I connected it to an input on my preamp and got music. But it doesn't really sound very good.
What intermediary pieces of equipment do I need between the Touch and the preamp to get sound that rivals/exceeds my CDP? WHat would financially to accomplish this without foregoing my first born child?

Thanks.