could someone be so kind as to tell me if all these components are compatible with each other?
High end computer
Intel core i7-3770K 3.5GHz Socket 1155 8MB Cache (£263.76)
Asus P8Z77-V DELUXE Z77 Socket 1155 8 Channel HD Audio ATX
(£201.20
Kingston 16GB DD53 2400 MHz HyperX XMP Beast Series (£124.98)
Gigabyte GTX 680 4GB GDDR5 6008MHz Dual DVI HDMI Display Port PCI-E Graphics (£458.50)
WD 1TB Black Desktop Drive (£74.99)
Samsung 256GB 840 Pro Series SSD (£185.00)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence STX (£151.97)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Middle spec computer
Intel core i5-3570K 3.4GHz Socket 1155 6MB Cache (£181.31)
ASUS P8Z77-V Pro 277 Socket 1155 8 Channel HD Audio ATX (£170.16)
Kingston 16GB DD53 1866 MHz HyperX XMP Beast Series (£119.50)
Gigabyte GTX 680 OC Windforce X3 2GB GDDR5 Dual DVI HDMI Display Port PCI-E Graphics (£530.00)
WD 1TB Black Desktop Drive (£74.99)
Samsung 128GB 840 Pro Series SSD (£119.99)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence ST (£140.99)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Low end computer
Intel core i5-2500K 3.3GHz Socket 1155 6MG Cache (£175.43)
Asus P8Z77-V Socket 1155 VGA DVI Display Port HDMI 8 Channel Audio ATX (£135.96)
Kingston 8GB DD53 2400 MHz HyperX XMP Beast Series (£66.83)
Gigabyte GTX 670 4GB GDDR5 6008MHz Dual DVI HDMI Display Port PCI-E Graphics (£368.50)
WD 1TB Black Desktop Drive (£74.99)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence ST (£140.99)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Also I'm unsure what power supply to use for each spec?
High end computer
Intel core i7-3770K 3.5GHz Socket 1155 8MB Cache (£263.76)
Asus P8Z77-V DELUXE Z77 Socket 1155 8 Channel HD Audio ATX
(£201.20
Kingston 16GB DD53 2400 MHz HyperX XMP Beast Series (£124.98)
Gigabyte GTX 680 4GB GDDR5 6008MHz Dual DVI HDMI Display Port PCI-E Graphics (£458.50)
WD 1TB Black Desktop Drive (£74.99)
Samsung 256GB 840 Pro Series SSD (£185.00)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence STX (£151.97)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Middle spec computer
Intel core i5-3570K 3.4GHz Socket 1155 6MB Cache (£181.31)
ASUS P8Z77-V Pro 277 Socket 1155 8 Channel HD Audio ATX (£170.16)
Kingston 16GB DD53 1866 MHz HyperX XMP Beast Series (£119.50)
Gigabyte GTX 680 OC Windforce X3 2GB GDDR5 Dual DVI HDMI Display Port PCI-E Graphics (£530.00)
WD 1TB Black Desktop Drive (£74.99)
Samsung 128GB 840 Pro Series SSD (£119.99)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence ST (£140.99)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Low end computer
Intel core i5-2500K 3.3GHz Socket 1155 6MG Cache (£175.43)
Asus P8Z77-V Socket 1155 VGA DVI Display Port HDMI 8 Channel Audio ATX (£135.96)
Kingston 8GB DD53 2400 MHz HyperX XMP Beast Series (£66.83)
Gigabyte GTX 670 4GB GDDR5 6008MHz Dual DVI HDMI Display Port PCI-E Graphics (£368.50)
WD 1TB Black Desktop Drive (£74.99)
Corsair Hydro H100 Extreme Performance water cooling (£89.94)
ASUS Xonar Essence ST (£140.99)
Corsair Obsidian 800D Case - 3x 140mm Fans with 4x Hot-Swap Hard Drive Bays (£222.89)
Windows 7 Home Premium 64 bit (£68.24)
LG 16x SATA Internal BDRW Bare + Software (£80.50)
Also I'm unsure what power supply to use for each spec?