8400 has been having a lot of problems in my store, big turnaround. Might have been a bad shipment. Sanyo is usually pretty good, we have yet to get our shipment of M500's but from the specs I have been reading its sounds good. If it were me and I were a Music Store buff, I would get the Fusic, it has an FM Music Transmitter so you can send songs from Music Store to your car radio without any wires, just tune your radio to 88.1 FM. 😎

it depends on what ur looking for in a phone really. PDA the best by far 6700 and as far as music i would have to say fusic. just reliability to make calls and durability i have to say any samsung and the A640 is packed with features for its price

I've been using the M500 for the past couple of weeks and it's great. The form factor and features make it outstanding. Plus if you want to use it as a music player it has expandable memory, unlike the 7500. I have a 1GB card in mine and it works beautifully. The only things the 8400 has over the M500 is a flash for the camera, a higher res screen and a better speaker phone. I am happy to sacrifice those features for the size and weight of the M500. Plus it's a Samsung so it's hard to go wrong. (My two pennies...) 😁

By the way not a big fan of the fusic. You can buy a fm transmitter at best buy for $21 and do the same thing wit any phone. I really was hoping for a phone that was a phone not everyone has.