Ok, so I have decided to build my own comp. I recently went around some local stores and found all the parts I am looking for. Just to double check, will this run Blockland at an efficient speed at higher brick counts.

Antec Mid Tower Case
Gigabyte GA-MA 785GMT-UD2 Motherboard
Antec 750w Power Supply
ATI Radeon HD 5770
AMD Athlon II x3 435
DDR3 RAM 8Gb
Hitachi 1Tb SATA 3.5" Hard Drive
LG 23" Monitor
For a little less then a 1 grand.