Uhm.. I think the key words there were "home computer", I'm pretty sure his boss would be a liittle pissed if he asked for a $10,000 server.
MooseKnuckle
How much does your boss know about computers? Would you want to put your own machine together? Depending on his position you can probably get away with building/custom-ordering a $2,500-$3,500 machine. As to what you should get - what is it that you want to use it for?