Here is my dream though: Wouldn't it be nice to have 500-1000GB of music on-the-go without need of wifi/3G? A 2.5" SATA slot would give a DAP that much of storage space, although battery and size could be a problem there.
Sure, I can live with just 120GB of LAME V0 mp3. But I have spent years to pick out and compress those favorite 120GB from my 3.5TB lossless flac collection. And my favorite genres oftentimes rotate among New Age, Rock, Jazz, Classical and folk (I have ~500GB of each genre). So a DAP of 1TB capacity would be my dream.
Sorry for my rant and back to our topic, I am happy enough with what X5 has to offer :-)