I've got over 200GB of music and it's only MP3 format!
My solution has been to combine my love for music with my interest in electronic gadgets. I've got over 14 DAP's, most older HDD DAP's bought second hand, and I put music on them according to genre. I've also got a Rio Karma on the way, so that makes it 15 in total.
A great thing about older DAP's is that they are easily modded. I can assure you that older DAP's do not sound worse than newer ones. Some of them sound as good as or even better than the best current mainstream DAP's. You could look into the iRiver H1x0 DAP's (H120 with 20GB HDD and H140 with 40GB HDD). They are still popular because of the digital output and can be a bit expensive. There's also the iRiver H3x0 and Cowon X5.
I have seen examples of old iRiver H1x0 modded with a 80GB, and I even saw someone replacing the original HDD with a 128GB SSD.
The you install Rockbox and get a great DAP. IMO the old iRiver and Cowon HDD DAP's easily outclass iPod.
I like my solution since I get to use old Sony,, Samsung, iRiver, Rio, Kenwood, Victor and Creative DAP's. They're all pretty good in their own way.
Edited by Danneq - 9/9/12 at 10:19am