The fact that Gurck says what he does so often doesn't mean it's not right. The iPod is overpriced in terms of the features it contains when compared to other players. The interface is nice, there's no doubt about that. It's also pretty simplistic, and doesn't offer nearly as many options as the x5 does. Some people don't care about these features though, so for them an iPod makes sense. I showed a girl I know the X5 last night, and she said she'd still take her iPod because she loves iTunes and it does everything she wants it to.
As I pointed out earlier, the x5 will likely receive ID3 support in a future firmware update. Also, did anyone notice it functions as a USB host? If you have a supported digital camera (or a supported card reader) you can transfer files directly to the X5 from the card. This means if you have an X5, you don't need to buy large storage cards for your other digital devices.
If you're looking to buy a player right now, and ID3 support is the only thing stopping you, I'd say get the X5 and wait to see if the firmware gets updated like Cowon says it will. If not, you can always sell the player for close to what you paid for it. If you can wait, then wait a few months until you make your decision.