I'm going to meet you half-way here even though I'm a dedicated Apple user now...
If your main thing is portability, go for the MacBook or the dv2000t. I can't stress enough to people that the integrated graphics in my MacBook work fine. Now when it comes down to price, also remember that you're paying for the OS. I found that in spending a little more for my MacBook... I had a much more pleasant experience and since November... I've not had one glitch in my laptop's operation. Just a side note also - the black MacBook (albeit more expensive) is very attractive and the matte finish makes it very hard to fingerprint, but don't just think about design. My white MacBook has recieved praise for being so minimalistic and attractive as well.
If you really would prefer the HP though, don't hesitate. I'm always one to say that you should stick to what you're comfortable with. It just depends though. What would you really prefer? Moving around with it easier, or what's inside?
I'm going the college this fall and have come to the conclusion that my HP Pavilion zd8000 is just too bulky to haul around between school, home, and classes. I have done a scan of some notebooks around the market these days and have come to like three notebooks and would like some opinions on which would be best. All these notebooks will have the Intel Core 2 Duo T7200 2.0GHz processors in them and be upgraded to 2 gigs of memory.
The HP dv2000t: my zd8000 has been faithful to me and naturally I looked at HP first. I found the dv2000t to be appealing. It's sleek and has all the features I want and is very portable. The only think I do not enjoy about it is that it has an integrated graphics card. I'm not going to be gaming on this machine, but I do use Photoshop 7 a lot.
The HP dv6000t: The bigger cousin to the dv2000t, it's main improvements is a larger screen and a separate graphics card. The only pitfall with this model is that I don't believe it would be quite as portable as it's smaller brethren.
The 13-inch White MacBook with the Intel Core 2 Duo 2.0GHz processor. I am a very large fan of OS X but I don't like the design of the case as much as the HPs. I also feel that it's price is a bit high. It is also the most portable of the notebooks I've listed here.
I just want to get some of your opinions and hands-on experience. Thanks.