Hope I'm not bringing up a dead horse here or committing a n00b error by resurrecting a dead thread.
If I am you can beat me.
But I have just gotten into this topic of sound quality and have bee browsing the forum for the last few days. Decided to research some of my audio devices. While I don't consider myself an audiophile I can appreciate some good sound. I am currently on deployment and was debating which iPod to bring with me. I have an iPod 4th gen, and an iPod 5.5gen. Along with a newer nano for working out/running with.
Anyhow when I was listening to the 4th gen vs the 5.5gen, I realized the audio quality of the 5.5gen was much better. Didn't know it was due to the Wolfson chip.
Anyhow I was reading some of the peoples concerns here about wanting the 5th gen iPods for sound quality, but their reluctance at getting an iPod without solid state memory.
Well hopefully this will help solve some of these concerns. Here is what I did for both my 4th gen iPod and by 5.5 gen iPod when my HDDs started to die.
I ordered the following parts, and converted my HDD from an 80GB HDD, to a 128GB SD card.
CF to 50 Pin 1.8 IDE Adapter:
http://www.amazon.com/gp/product/B004FCY7WQ/ref=oh_details_o06_s00_i01?ie=UTF8&psc=1
SD-CF II: SD to CF Type II Adapter (Supports SDHC MMC)
http://www.amazon.com/gp/product/B000YZGCIU/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1
Komputerbay 128GB SDXC
http://www.newegg.com/Product/Product.aspx?Item=9SIA26X0S23395
This is the adaptor I used for my 4th Gen iPod to take it from 20GB HDD to a 128GB SD card.
http://www.tarkan.info/20080115/tutorials/iflash-ipod-compact-flash-mk2
~$100 and your iPod is much more reliable, more capacity and a lot faster.
I'm still using the apple OS on the iPod but i'm sure with Rockbox you can have a totally custom iPod, the way apple should have released it. I also installed a higher capacity battery since my original one was dieing on me and I had the iPod disassembled.
Forgive me if this has been covered somewhere.
Still a n00b