What are the most important things to consider when buying a computer for DTP???

[Banditbanger]

Hi,

can you guys help me with advice on what to consider when buying a new computer for DTP (I'm using mainly Photoshop, CorelDraw, etc.) Which are the most important things to look for hardware-wise? I know RAM is important, but how much and which tipe do I need? What about other components, like CPU and HDD?

Thank you for any advice!