I had a 6600 for a while. Nice reliable phone, though chunky. The MMC card is under the battery, but at least it has a MMC card. Can use .wav files as ringtones. Great battery life, and Bluetooth works fine. The operating system is pretty slow.
6600 with the latest firmware is actually pretty fast. The operating system on it beats the e398. The only good thing about the e398 is its style, and its speakers.
