Have you also looked at the Sandisk Sansa e200 series?
The Samsung YP-T9 & YP-K3
The Cowon D2
The Cowon iAudio7
The Creative Zen Stone Plus
The Insignia NS-DV2G/4G
The Meizu M6
The iriver T60
The iriver Clix2
Just for starters: these are all MSC/UMS-compliant flash DAP's with at least 2GB capacities (some have more). The Samsung and Cowon models will give you the best audio quality, the iAudio7 has killer battery life (60 hours), the Insignia and Meizu DAP's (like the Sansas) give you the most features for your buck, and the iriver - while also having stellar audio - has awesome GUI's....
let us know which one you get......
