First, thanks to all the Tom's Hardware forum contributors - I have learned a lot reading your debates, questions, responses and recommendations.
I am going to undertake my first build, budget between 1500 and 2000. Eventually would like to upgrade to dual GPUs and delve into overclocking but only after some experience but want to design the upgrade capability up front. My proposed component list is below and I invite comments. Primary use is gaming, modding, music play and some movie watching (but not video editing) and the inevitable work related functions so I can pay for this. Wife appeal is a factor (thus the Obsidian 550D Case).
LG BH14NS40 14X SATA Blu-ray BDXL Internal Rewriter with Software
ASUS XONAR D1 -7.1 Channel PCI Audio Card Sound Card
Rosewill 74-In-1 3.5-Inch Internal Card Reader with USB Port 3.0 (RDCR-11003)
Corsair Hydro Series H80 High Performance Liquid CPU Cooler (CWCH80)
Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz (PC3 12800) 240-Pin DDR3 Memory Kit for Core i3, i5, i7 and Platforms SDRAM CMZ8GX3M2A1600C9
ASRock Intel X79 ATX DDR3 1600 LGA 2011 Motherboards X79 EXTREME4
Corsair Obsidian Series Black 550D Mid Tower Computer Case (CC-9011015-WW)
Corsair Professional Series AX 850 Watt ATX/EPS Modular 80 PLUS Gold (AX850)
GIGABYTE GV-N670OC-2GD GeForce GTX 670 Windforce OC 2048MB GDDR5 256-bit PCI Express 3.0 x16 HDCP Ready SLI Support Graphics Card
Windows 7 Home Premium SP1 64bit (Full) System Builder DVD 1 Pack
Western Digital Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD1002FAEX
Intel Core i5-3570K Quad-Core Processor 3.4 GHz 4 Core LGA 1155 - BX80637I53570K
Very nice system mate, but you chose a X79 motherboard, wich is designed for socket LGA 2011 cpu's, and you chose a socket LGA 1155 cpu, so you'll need to find a Z77 board for your cpu, or get another cpu.