As you know, head-fi is the land of the .01%, where spending thousands to improve the slightest bit of sound is the best of deals.
With $100 dollar IEM's (RE-400) and a generic iPod (Newest Nano, 7G), I feel that I want to improve my sound. However, I'm hesitant to replace my DAP because I'm not sure how much of a difference it will make. On ClieOS's blog, he mentions that upgrading the player has a larger effect than the headphones themselves... but I'm wondering just how large the difference is.
So, how large is the difference in SQ between iPods and (cheap) audiophile players e.g. Fiio X3 and iBasso DX50?
I don't have much to compare a difference between as I'm relatively new to the audio upgrade path. When I ask how large the difference is, could you respond in terms of an upgrade in IEM's (like the upgrade from a $20 cheapie to a RE-400 or GR06 or to other similarly priced IEM) or at least, for example, 5/10 -> 7/10?