First off thank you for taking the time to try and help me 
Ok so after thinking of upgrading I have come to the conclusion I'll be better off building new and selling off the old.
Old spec:
gigabyte ga-78lmt-usb3 4.1 running f4 bios
amd fx6300 6 core
16GB DDR3 1600mhz Kingston hyper x
sapphire radion 7750 hd 1G ddr5
cheap and maybe not so cheerful HDD 1TB and dvdrw
cit atx 500cb PSU
To keep from the old:
16GB DDR3 1600mhz Kingston hyper x
Saphire Radeon HD7750 (temporarily)
HDD and DVD
To buy new, (sorry couldn't work out that shopping cart thing you guys do.)
Asus M5A99X PRO R2.0 AMD 990X (Socket AM3+) DDR3 ATX Motherboard Asus M5A99X PRO R2.0 AMD 990X (Socket AM3+) DDR3 ATX Motherboard £119.99
(£99.99) £119.99
(£99.99)
AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail £119.99
(£99.99) £119.99
(£99.99)
Antec High Current Gamer 520W '80 Plus Bronze' Power Supply Antec High Current Gamer 520W '80 Plus Bronze' Power Supply £59.99
(£49.99) £59.99
(£49.99)
Corsair Hydro H80 High Performance Liquid CPU Cooler *Manufacturer Refurbished Unit - 90 Day Guarantee Corsair Hydro H80 High Performance Liquid CPU Cooler *Manufacturer Refurbished Unit - 90 Day Guarantee £39.95
(£33.29) £39.95
(£33.29)
BitFenix Merc Alpha Gaming Case - Black BitFenix Merc Alpha Gaming Case - Black £32.99
(£27.49) £32.99
(£27.49)
Prolimatech PK-1 Nano Thermal Compound (1g) Prolimatech PK-1 Nano Thermal Compound (1g)
Total 312.41 inc vat £388.99
All items listed above are my current choices, if you have any suggestions, please comment or otherwise please confirm its a good choice!
The idea is to have the fastest system I can afford and to help with this
I will be planning this to be a 2 stage upgrade, the list above (or your best recommendations,) followed by GPU in a couple of months time leaving the option open to crossfire in the future.

Ok so after thinking of upgrading I have come to the conclusion I'll be better off building new and selling off the old.
Old spec:
gigabyte ga-78lmt-usb3 4.1 running f4 bios
amd fx6300 6 core
16GB DDR3 1600mhz Kingston hyper x
sapphire radion 7750 hd 1G ddr5
cheap and maybe not so cheerful HDD 1TB and dvdrw
cit atx 500cb PSU
To keep from the old:
16GB DDR3 1600mhz Kingston hyper x
Saphire Radeon HD7750 (temporarily)
HDD and DVD
To buy new, (sorry couldn't work out that shopping cart thing you guys do.)
Asus M5A99X PRO R2.0 AMD 990X (Socket AM3+) DDR3 ATX Motherboard Asus M5A99X PRO R2.0 AMD 990X (Socket AM3+) DDR3 ATX Motherboard £119.99
(£99.99) £119.99
(£99.99)
AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail AMD Piledriver FX-8 Eight Core 8320 Black Edition 3.50GHz (Socket AM3+) Processor - Retail £119.99
(£99.99) £119.99
(£99.99)
Antec High Current Gamer 520W '80 Plus Bronze' Power Supply Antec High Current Gamer 520W '80 Plus Bronze' Power Supply £59.99
(£49.99) £59.99
(£49.99)
Corsair Hydro H80 High Performance Liquid CPU Cooler *Manufacturer Refurbished Unit - 90 Day Guarantee Corsair Hydro H80 High Performance Liquid CPU Cooler *Manufacturer Refurbished Unit - 90 Day Guarantee £39.95
(£33.29) £39.95
(£33.29)
BitFenix Merc Alpha Gaming Case - Black BitFenix Merc Alpha Gaming Case - Black £32.99
(£27.49) £32.99
(£27.49)
Prolimatech PK-1 Nano Thermal Compound (1g) Prolimatech PK-1 Nano Thermal Compound (1g)
Total 312.41 inc vat £388.99
All items listed above are my current choices, if you have any suggestions, please comment or otherwise please confirm its a good choice!
The idea is to have the fastest system I can afford and to help with this
I will be planning this to be a 2 stage upgrade, the list above (or your best recommendations,) followed by GPU in a couple of months time leaving the option open to crossfire in the future.