After nearly two months with my zx300, overall I'm very happy, here are a couple of additions I'd love adding in future firmware updates:
- Search: has been mentioned a few times on this thread, the speed of scrolling of the lists kind of makes it not essential but would be nice
- Sorting: I would love to be able to sort the album list by artist name
- Random x Albums (where x is 20 or 30 or 50 etc): Would love this, sometimes it's a great way to select something you've not heard in a while if it's dished up for you, especially if you've got hundreds of albums
There's room for a few more buttons on the display screen, hopefully Sony will add a few more in the coming months / year.