Cheap motherboard to replace ACPI x64 based pc?

[acpete]

What is a Cheap motherboard to replace ACPI x64 based pc?

MY computer:
WINDOWS 7 ULTIMATE 64 bit
ACPI 64x based PC
QUAD CORE Intel i3 540 @ 3.07ghz
4gb DDR3 RAM
Maxtor 250gb hard drive; model 7Y250M0
Nvidia Gefore 9500gt 1 GB
Realtek high definition audio
Realtek PCIe GBE family Controller (network card)
LG HL-DT-ST DVD-RAM; model GH22LS30 (DVD/CD RW)
Dell 2208WFP (analog) monitor

 

[acpete]

Found out the model name of my acpi 64x based pc with a program called CPU-Z!

MY MOTHERBOARD IS A: BIOSTAR TH55 HD

Is this a good motherboard?

What would be a good upgrade?
It needs to fit🙁2 intel i3 (model540s) @ 3.06ghz) socket 1156