May be building a PC - Suggestions for budget under $1,000 USD?

[mrstickball]

I may be building one in the future.

Having a high-end PC for gaming isn't the goal, to be honest. I don't need insane graphics cards. I am more concerned with computational power to ensure that my spreadsheets work quickly. I would assume for something like that, a better CPU & RAM are the order of the day, but I am interested in hearing all suggestions.

My budget is under $1,000 not including the monitor. Thats US dollars, folks, so that means like 400 Euros.

I am unsure who to buy off of - I usually go with Tiger Direct or Newegg...Are there any other stores to look into?

Thanks!