Digital BW, The Print

Hello,
I am planning on buying a new PC to use with PS CS2 and an Epson 
R2400  and was looking for recommendations on Processor and memory. I 
want to get something that is fast enough but will not break the bank. 
Dell has Pentium 4 and Pentium D and Xeon. Does anyone have experience 
with these and what speed of processor is necessary? 
Thanks,
Gary W