I've had some serious time spent into looking into a lot of the details entailing what I might call my perfect computer, so here goes... (this may evolve over time). This is more of a notepad for myself than anything, but you can use it as a guideline to remember things.
6 core 4 gHz CPU (+2 cores for standard processing)
Overclock / Undervolt toggle ability
Ability to shut down / put to "deep sleep" cores
8 GB gaming RAM
50-100 GB Solid-state drive to speed up boot/most used programs/shut down/etc
50 GB Solid-state drive for factory reset purposes
25-50 TB Hard Disk Drive for everything else.
Ability to shut off certain sectors of hard disk to use for system speed-up
2-4 Disk Drives Blu-ray compatible
Triple Boot System (Windows 7 Ultimate / OSX / Ubuntu)
Full ergonomic keyboard with light up keys (keys are covered in plastic *not paint*)
Mousepad on keyboard
Dedicated Camera/webcam buttons on keyboard
Right-handed gaming mouse with a cloth-covered cord for least desk corner / side resistance
10+ MP webcam / camera
High Definition PCM Microphone
High Definition 7.1 Surround Sound Speakers / hook-up
The latest wireless network adapter
High Definition 32" 1080p LED screen