computer wise, heres a much better suggestion for not a lot more money:
YOUR BASKET
1 x
Gigabyte 990XA-UD3 AMD 990X (Socket AM3+) DDR3 Motherboard £94.99
1 x
Seagate Barracuda 7200.12 1TB SATA 6Gb/s 32MB Cache - OEM (ST31000524AS) £44.99
1 x
Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/8GX) £39.98
Total : £179.96 (includes shipping: FREE).
motherboard supports crossfire/SLI at x8/x8 (speeds which wont bottleneck the card except for on massive resolutions)
RAM is compatible with all air coolers
hard drive is much faster
as for the audio, do the sensible thing and get home theatre stuff. no matter how much you go on about it being good quality the home theatre stuff will be better (and going for massive power low quality speakers will sound poor and **** off the neighbours)
while i think about it, you said you knew of a good cheap 1300W PSU to power some stuff off of. there is no such thing as a good cheap PSU, they are mutually exclusive. you will not find a 1300W PSU that is of a high enough quality to even consider powering expensive equipment for under £125 new in england. you might do in different countries, but with import costs and taxes it will almst certainly go above that
also, you keep going for cheap stuff and it keeps breaking. everyone else on these forums goes for more expensive stuff and it rarely breaks. there might just be a connection there