Replying to Computer Nerds - need your help, do I have all the parts I need to build a hackentosh?

Processor: Intel Core i5-655K Clarkdale 3.2GHz LGA 1156 73W Dual-Core Unlocked Desktop Processor BX80616I5655K

Motherboard: BIOSTAR H55A+ LGA 1156 Intel H55 HDMI ATX Intel Motherboard

Memory:G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL (times two for 8gb)

Video Card:Palit NE5S4500FHD01 GeForce GTS 450 (Fermi) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

Sound Card:ASUS Xonar DS 7.1 Channels PCI Interface Audio Card

Firewire:SIIG 3 Ports FireWire 800 PCIe Card Model NN-FW0012-S1

Power Supply:Rosewill Green Series RG700-S12 700W Continuous @40°C,80 PLUS Certified,Single 12V Rail,Active PFC"Compatible with Core i7, ...

Hard drive:Seagate Barracuda 7200.11 ST31500341AS 1.5TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

DVD Burner:LITE-ON CD/DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM


am I missing parts? do I have stuff I don't actually need? for $861.89 I think I did well, but I want to make sure im not fucking anything up