Instead of the WD Caviar Blue, go for the SAMSUNG Spinpoint F3 500 GB.
As for your motherboard, I recommend the ASRock 870 Extreme3 which has two PCI ports (one will be blocked if you use a dual slot graphics card in the second PCI-E slot) for $94.99.
If not, the ASUS M4A89GTD Pro/USB3 is a good option too, but if you do use a dual slot graphics card in the second PCI-E 16x slot, it will block a port, it costs $139.99.
The GIGABYTE GA-770TA-UD3 has quite a few PCI slots, for $79.99 after rebate.
The graphics card that I have purchased is a
EVGA 012-P3-1472-AR GeForce GTX 470 1280MB Superclocked
and the sound card that I plan install which requires a one available PCI 2.1/2.2 Slot
is this http://store.razerzone.com/store/razerusa/en_US/pd/productID.169415400
Thanks for the advice and for the assistance