I got an AMD2500+ (Intel equivalent is just about as good for the purpose but the AMD was cheaper for me), 1.5GB RAM (I'd get 2GB today), an inexpensive Asus board - you should choose one with at least one PCIe slot on it if you plan on future upgrades. Onboard graphics are ok if you're just doing music or office work on that computer, an extra graphics card could let you gain a little performance and giving you the last megabytes in RAM like a radeon 7xxx/9xxx or geforce4 mx for around 30 bucks...
The only thing I'd look out for is to purchase relatively quiet parts. You will need it and find out you'll spend the money twice if you don't. My soundcard is a M-Audio Audiophile 24/96, does quite well for the money. Connected to that are the keys, a Fatar SL-990 (action ok, missing additional controllers here).
If you don't feel comfortable building the hardware yourself, there are a few DAW builders that put the parts together for you. As sequencer I use Sonar (Cubase, Nuendo are also there) and as sampler GigaStudio (others are e.g. Kontakt, Halion). With the VIs you don't need a sampler.
Hope this helps,
PolarBear
The only thing I'd look out for is to purchase relatively quiet parts. You will need it and find out you'll spend the money twice if you don't. My soundcard is a M-Audio Audiophile 24/96, does quite well for the money. Connected to that are the keys, a Fatar SL-990 (action ok, missing additional controllers here).
If you don't feel comfortable building the hardware yourself, there are a few DAW builders that put the parts together for you. As sequencer I use Sonar (Cubase, Nuendo are also there) and as sampler GigaStudio (others are e.g. Kontakt, Halion). With the VIs you don't need a sampler.
Hope this helps,
PolarBear