Here's all the stuff I use to make my music.
Computer
Processor
Pentium 4 2.4 GHZ - Although somewhat dated, this processor has proven essential to my music. It can handle quite a few different effects simultaneously, and synthesize 2 reaktor synths simultaneously.
Memory
512MB Micron - So I heard Micron was the best. The more memory, the more samples you can fit into your song, and the less buffer underruns you will experience. (Although the sound card plays a very important role in this as well.
Sound Card
Sound Blaster Live 5.1 - Pretty crappy sound card if you ask me, but it is accurate enough for my purposes. Don't ever try to record anything with this.
Hard Drive
Seagate 40 gig Silent - Amazingly quiet drive, no clicks or noises whatsoever. From 5 feet away it produces a consistent noise floor only a few DB above regular room noise. Lack of clicking makes it ideal for noise removal algorythms.
CD Burner
Mitsumi 4x - Recently stopped working. Seeing as this was one of the first mass produced cd-writers, this one worked particularly well. Had only messed up about 2 CDs until its death.
Software
Sound Forge 4.5
Editing Individual Samples / Fixing Pops in Loops
Cool Edit 2.0
Converting wav files into MP3's / Noise Reduction
Fruity Loops 3
Creating loops from individual samples / Tweaking Sounds
ACID Pro 4.0
Loop Sequencing
Speaker System
Amp
Technics SA-EX110
Large (bassy) Speakers
Yamaha NS-A638
Mini (detail) Speakers
Emerson 60-1179
Headphones
Pioneer DJSE-DJ5000
Input Devices
64 Key Keyboard
M-Audio Radium 64
60 Key Keyboard
Yamaha PSR-500M - I use this to input melodies into reason and fruity loops. This is the newest edition to my setup. This was not used to create any songs preceding "Dreaming In Overdrive".
4 track A/D converter
M-Audio Delta 66 - This is used to record things like the guitars.