you're weird... you say in one breath that you're keeping the case and then the next that you're ditching it.
Anyway for 99% of pc building all you need is a screwdriver (or 2) and the innerds.
you should be able to cannibalise the following from your dead rig:
1) CASE
2) DVD
3) PSU
4) GFX Card
then you need to buy
5) Mobo
6) CPU
7) HSF

Memory
9) Windows 7
10) SSD for OS
11) 1TB HDD
12) You may need some power cable adaptors... open your current pc and have a look.
5,6,7,8 and 9 can be got from this link in one bundle
http://3xs.scan.co.uk/ConfigureSystem.asp?SystemID=1295 doesn't have a case or any of that stuff.
10 is the other link i posted
for cable checking.... have a look at the current power going to the motherboard and compare it to the adaptor on the new mobo to check your psu is transferrable... if it is then you need to check the other plugs... you may need one for the graphics card, you'll need 3 small power things for the hdds and one large one for the DVD
OK you don't need a grounding cable... just don't do it in a woolen sweater... just touch a radiator if you get nervous about static.
The thing about assembling a PC is that the motherboard manual is usually totally comprehensive... read it. TWICE.
a) clean your case... get rid of all the fluff and crap, clean the case fans and grilles
b) when you took your old motherboard out you should have noticed some risers which lift the mobo up off the back plate... they look like
thisyou want to check your new motherboard's holes and put them in the right position.There should be 9 in total
c) before you put the motherboard in place you want to put the backplate in, which should be a flimsy bit of metal for all the USB ports etc.
-- I usually do the next few steps on the squidgy packaging that comes with the motherboard... it's insulated and it has some give --
d) Now carefully put in the cpu into the motherboard.
e) now apply the thermal paste... whatever you just put on, take half of it off! you need a really thin even layer. 2 good ways of applying it are with a credit card to scrape it across, or put your hand in a plastic bag and use the bag to smear it around. (check with scan that some thermal paste comes with the bundle!)
f) now put the HSF onto the motherboard. Assembly instructions vary massively, just be firm with any screws but don't go all arnie on it.
g) Now put the memory in... depending on the idiocy of the motherboard & size of HSF you may need to swap steps f and g
h) now firmly push the motherboard into the backplate and gently lower the mobo onto the risers. Screw in the risers so that the motherboard is secure. again firm but not bruteforce... remember this needs to sit vertically so it needs to be stable.
i) Plug in the PSU onto the motherboard
j) Plug in the SSD, 1TB HDD and DVD (and their respective PSUs) - leave your old hdd separate for now
k) plug in the Case jumpers... it's hard to say which way round they go, but just consult the manual... don't worry, the reset and power switches can be either way round... the LEDs do care but if you get them the wrong way round it won't break anything just swap them round.
l) plug in the USB cables, these will only go one way round
m) plug in the graphics card (and power to it if applicable)
Plug in the power to the PSU and the monitor to the gfx card, kb, mouse and press the power button and hope for the best
it's all super easy, but your heart will be doing 145 when you first POST
there's a good chance I forgot something but someone else can correct
That's The REVEREND Dr. Kazza to you.