I bought the iaudio x5.
It’s bigger than the trekstor vibez, but it also has a bigger battery (34 hours running rockbox) and a bigger hard drive (30gb vs 12). I am liking the sound a lot (20mW+20mW into 16 ohms). It also runs rockbox, the open-source third-party firmware that rocks my socks off. It does everything. It even writes a scrobbler log file so I can submit my listened-to tracks to last.fm. Plus, I’ve only charged it once since I got it, and it still has more than a half charge (a week and some?).
The recording quality is much better, -80dB noise floor, -60dB noise floor when HD is spinning.
Anyway, that’s all for today, kids.