best SQ- good headphones / line-out+amp
I have seen a detailed review in French that says the vibez has slightly better SQ than the X5 - detail and stereo separation.However, the X5 has easy access to line-out through a small dongle. If you have a headphone amp with volume control... the Fiio E5 is coming out soon and may only cost $15... this would likely overcome any small advantage of the Vibez (unless there is a dock available with line-out for the vibez).
With a small amp (some are very small) you can drive really nice headphones.
The vibez has 7.5mw per channel, the X5 has 20mw / channel, the A3 has 30mw / channel. The extra power would let you drive better headphones.
The X5 has enough power to drive the AKG K271 without an amp, and they sound super if you don't need thumping bass... theres the Sennheiser HD 25 if you do. With an amp you could drive any high impedence headphones... a higher end Beyerdynamic or AKG (open or closed depending on your needs)... would be an unbeatable sound advantage for the Cowon products.
I have compared the Cowon X5 and A3, and I found the A3 to be significantly better than the X5. The A3 may be too big for you, but I suspect it has significantly better SQ than the vibez and comes in an 80GB version.
They both do flac and lower-compression ape, and support many other codecs. I particularly like the X5 with Rockbox, which allows a larger range of codec support and a plethora of DSP; plus the interface was much more intuitive for me.
If the X5 or A3 are too big for you, Cowon may have some new smaller product with a line out or more powerful amp than the vibez.
A lot of people object to the Cowon interface. The joystick works really well for me with Rockbox... true it's more complicated and takes longer to figure out, but for me it was worth it. The joystick can be pressed in any of four directions plus down, plus there are three buttons on the side, for a total of 8 different actions. But each one can be done quick or held for a beat, which gives different results, so there are 16 actions. Sometimes a double-click also has a different meaning/effect. Plus each one acts different depending on the context, so there are 40 or 50 different meanings for the actions. You have to read the manual and practice them or you will be guessing and bumbling around for along time (I know)... but once you learn it it is an efficient and ergonomic interface.
The Cowon products automatically act like mass storage devices on a PC so you can drag and drop files... there's a way to install the vibez so it behaves that way, or by default it uses special MTP transfer software, so you have a choice. The native Cowon software on the X5 doesn't support ID tags, but Rockbox does. You can install Rockbox on the X5 with a dual-boot patch. There is no Rockbox for the A3 but the A3 software is pretty good.








