Asus, take a look here.
On the page it shows all the versions of the Asus P8Z77 line.
My qualifications are as follows:
>at least two PCI-E x16 slots that support SLI
>at least one, preferably more PCI slots
>at least 6, preferably 8 SATA connectors
>4x240pin RAM slots
All this for less than $150? Good Luck.