I really don't like AMD based laptops. For desktop PC, AMD Athlon 64 is far better but in laptops, it's another story.
I don't like it because the Core Duo ( and Core 2 Duo ) delivers better performances.
The Core Duo is on the Centrino Duo mobile platform. All components of this plaftform come from Intel labs. The processor, the wireless, the northbridge ... everything while AMD is picking parts from everyone. Nothing is better arrenged when all parts come from the same manufacturer.
The wireless software on a non-centrino wireless chip is always of an inferior quality.
The 64 bits leaves you put more than 4 GB of RAM in your computer, which is totally useless ! Today, 1 GB is fine, why put 4 GB !? With the 64 bits technology, you can now put 16 exabytes of RAM. 64 Bits technology leaves scientifics do longer mathematical equations ( 2 32 for 32 bits and 2 64 for 64-bits ).
The performances are the same.
For more details : http://en.wikipedia.org/wiki/64_bits
Hp is selling their older dv8000 for cheap because its gonna be replaced by the 9000. The 9000 wlll only have a 1.8ghz turion. The turion is 64 bit but does that make up for it being slower then the core duo? What does 64 bits do? What does it do for gaming? How about for video editing?