[LAU] high-powered laptop suggestions ?

Greetings, I'll be in the market for a better laptop later this year, and I need some specific features. I'd like to purchase a machine strong enough to handle my work with the AVSynthesis software. My desktop boxes include 2.0 and 2.4 GHz CPUs, with 3 and 2 GB memory, and they are not powerful enough for some of the combined OpenGL/Csound realtime processing. I'll need a machine with a very fast CPU (preferably 64-bit), large HD support, large RAM capacity, and accelerated 3D-capable graphics. The on-board sound will be replaced by an external device, preferably *not* a USB audio device. I want very high-quality audio, and eventually I'll need support for multichannel output. The display doesn't have to be humongous, just very clear. At this time price is no object, because I don't have the money for it now anyway. :) But I'm interested in the range of makers and prices that might appear for such a machine. So, what suggestions from the LAUyers ? Best, dp