hi man,
i don't know what is your budget, but personally i would recommend youá few bits i currently own or i have got experiences with:

PC (Desktop) - seems to be more or less ok. better buy 2 smaller hardrives. 1internal, lets say 320Gb for all installation and stuff, and the other one, lets say 320Gb or 500Gb external for all your samples, movies, etc...
RAM seems to be fine. Regarding PSU, I would recommend you Seasonic S12II-500 500W, rock stable and no too noisy.
Good and actually pretty cheap chipset from Intel is Intel Core 2 Duo E8400 BOX. Be sure you choose a motherboard which will work well with it.

As for the soundcard. I§d go for something bit more expensive, with more functions, better converters etc. I am using E-MU1212M, which is actually very very cheap, and it is using 120dB mastering grades D/A A/D converters,.. sound difference to Audiophile2496, which i owned before is immediatelly noticeable.
Software

Operating System:
MS Windows XP Pro

Production Suite:
Ableton V7

VST Options:

Synthesizer & Bass:
Synapse Audio Hydra (Junglist)
Albino
NI FM7 / FM8
NI Pro 53
GMedia Minimonsta
Zebra II

Drums:

NI Battery
Sonic charge uTonic

Effects:
Sonnox pack
Sonalkis Stereo Compressor & Filter
URS EQ & Compressors
Antares Filter & TUBE
Wizoo verb



Hardware

MIDI Controller Options:
Waveidea Bitstream 3X

Monitor Options:
Adam A7 or Dynaudio BM5A