I need help putting together a system for my family.
Peripherals: Monitor (Could probably be justified as additional cost)
Have speakers, mouse/keyboard etc
No real preference between Intel/AMD and Nvidia/ATI aside from the desire for it to be the best it can be for the available budget.
Soundcard is preferable (dad doesn't trust motherboard sound), storage needs to be ~1Tb, preferably a combined DVD reader/writer if possible within budget and it needs to be as close to future proof as it can be within the budgetary constraints. Brothers will use this for gaming/assorted inappropriate activities, probably will have a copy of Sibelius and maybe Sage (Accounting software).
Not sure why a sound card would be really wanted these days, but there is an option for it: Creative Soundblaster x-fi titanium £77.16.
Cheaper ones exist of course, but you can judge yourself what is a good price point here.
£706.07 with the sound card. ( £628.91 without it )
Monitor: This is really up to your preference so might want to check out models at the stores before ordering. Here is a decent one with fast 2ms response time. Samsung BX2335 LED 2ms response £167.69
with everything comes to about £800 with the monitor but without the sound card and then £880 with the sound card.
The build may be overkill on some parts and money can be save here and there with different selections, but it should get you started on what you can get.
The above build sounds about right however id upgrade that GTX 560 to a GTX 560 Ti. Prices for GTX 560 Ti are around £170-200 depending which manufacturer you go for which means it still fits your budget, but also gives much better gaming performance and great overclocking ability for even greater gaming performance.
I also had bunch of different cards as possible choices, the 6950 1GB was one as well,
but the £40-50 extra for 560 -> 560Ti or 6950 at this budget just seemed excessive.
But yeah if you take the monitor our of the equation, they do fit and would bring substantial speed increases.
You can pick up sound cards pretty cheap anyway like £20 or so. Since your not looking for any real specific requirements, i suggest just keep an eye out for parts on sale. Websites such as ebuyer constantly have daily deals and offers ect so when something fits your requirement, pick it up