pegasus
Journeyman
pegasus, your suggestion is very good if power saving is the only concern. But now a days when most of the applications are multithreaded, even the web applications, flash applications, a dual core is much more advisable. I think X3 is not required but X2 is a must have thing.
Reason is if you wanna do anything else apart from surfing, say using Word 2007, HD movie watching, running flash applications, a dual corre processor will add significant performance boost. Even web browsers like IE 8 and Firefox 3.6 are multi-Core aware.
So OP may drop the idea for Athlon II X3, but a Athlon II X2 is I think should be minimum requirement.
Yes- i too agree X2 is a good choice- X3 honestly is overkill for such a rig though i believe 'overkill' is non-existent if enough finances are existent.@pegasus your configaration is also good but if I have choice I would go for a Dual Core processor rather than sempron and when I am spending around 20k behind it. But saving electricity is also concern for all of. thanks for your suggestion.
I felt OP wanted to do more of downloading and some casual web browsing- more like a secondary download+browsing rig.
Sempron 140 is pretty good for the price i feel.
bornik will have to make a few adjustments to fit in that X2.
I have tried to included LCD (20" for better experience) and good UPS in the budget though i am not sure if he wants those and within 20K too.
I have not suggested any cheapo cabbinet and CM Elite 310 for this rig as i felt a 24x7 rig should have some decent ventilation (120MM fan at rear for exhaust and front intake fan for cooling HDD/s)
p.s. do the present batches of Sempron 140 unlock?