I really don't like the WD HDD. It's really slow compared to the F3. If you couldn't find that, get a Seagate 7200.12.
That's like a 250% markup on the CPU. Nasty.
That CPU will not work in the board I pointed you to. The board is an Intel LGA1156 board, you need an AMD AM3 one. Luckily, AMD boards are cheaper than Intel. I suggest the Asus M4A79XTD EVO. Over here it's $90 cheaper than the P7P55D-E Pro.
A few things trouble me about that board. First, Newegg doesn't have it, and Newegg has everything. Second, it lists DDR2 as the RAM standard, which if it's an AM3 board, wouldn't work. Third, the speeds of RAM they put on there wouldn't be DDR2 speeds anyway. Might want to check to see if they made an error in the listing...