To the original thread starter. I am in the same boat with you.
I want my PC to do a lot of things, and I want it to be fast, and I want it to be portable, and and more. I am into music, I play keyboard with a soft synthesizer. I use EMU soundcard with Emulatorx for sounds. I am into gaming. I also use Photoshop a lot.
Been looking into an Antec Aria and other Small Form Factor cases, such as ShuttleX etc. I'd rather have a portable SFF PC to go with maybe an LCD monitor. My next PC, I will design my own case, because my philosophy is this: The DVD-Drive ought to be external. This way, the case can be as compact as possible. It's probably will be something like this: CPU: Conroe 2.66 overclocked, Ninja cooler, motherboard should have at least 3 PCIe x16 slots, three Dual DVI graphic cards. EMU sound card. HDTV TV Tuner. Maybe a DVB card as well. The Serial ATA II, I either want the motherboard to have one connected to outside, or I will have a bracket for that. Cause in addition to the 2 hard drive i in RAID configuration, I would like a 3 drive for data transfer and back up, and it should be SATA II, I don't want just USB, it's not as fast.
I don't know about you, but whenever I am out, using a PC, I need an outlet, even in a coffee shop

. I don't really want to look at the battery level indicator.