new pc

hey,
im planning to assemble a desktop in a few months suggest me some configurations this is what ill be using it for:-

im not a hard core gamer but i want to play all the new games without lag
my hard disks will be accessed through the network a lot(dc)
the system will be on for large amounts of times continuosly...
ill be running a few servers and multi tasking quite a bit...

my budget is 55 k...