spending £85 on fans and a fan controller is complete overkill, especially if its for an old or cheap case. you say you havent ordered yet so i assume you are going to be ordering what youve listed in the OP (because its all pretty new stuff)
personally i would remove the many fans and fan controller and buy a fancy case with great air cooling to begin with if your worried about overheating:
YOUR BASKET
1 x
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - Retail with FREE TrackMania 2 Canyon PC Game £167.99
1 x
Silverstone Raven 2 RV02B Full Tower Case - Black £129.98
1 x
OcUK ATI Radeon HD 6870 1024MB GDDR5 PCI-Express Graphics Card with FREE Deus Ex PC Game £124.98
1 x
Gigabyte Z68XP-UD3 Intel Z68 (Socket 1155) DDR3 Motherboard ** LOWEST UK PRICE ** £99.98
1 x
LG BH10LS30 10x BluRay-RW / 16 x DVD±RW Drive - Black (Retail) £72.00
1 x
Antec TruePower New Modular 650W '80 Plus Bronze' Power Supply £69.98
1 x
Seagate Barracuda 7200.12 1TB SATA 6Gb/s 32MB Cache - OEM (ST31000524AS) £47.99
1 x
Kingston HyperX Blu 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9AD3B1K2/4G) £24.98
1 x
Gelid Tranquillo CPU Cooler (Socket 754/939/940/AM2/AM2+/AM3/LGA775/LGA1155/LGA1156/LGA1366) £22.98
Total : £777.37 (includes shipping : £13.75).
(if you could tell me if your recycling anything from your old build, or if the price is too much then i'll see what i can do to bring it back down again)
this should come to a similar price to what you were planning on buying before, but it will be a lot better. its probably best if i explain why though.
motherboard: just like the one you chose it will support SLI and crossfire. my one is slightly cheaper, and also supports all the benefits of the Z68 chipset, which are smartcaching (using 20GB of an SSD to make your hard drive a lot faster), faster video encoding and most importantly lucid virtu, which switches off the graphics cards when you are doing stuff the onboard graphics can cope with just fine (like browsing the internet). this should be very helpful if you leave the PC on for a long time
case: because of how the motherboard is mounted with the graphics card ports facing up, this case is regarded to have the best air cooling of any case on the market. it already comes with three very good 180mm fans
graphics: heres a comparison of the cards:
http://www.anandtech.com/bench/Product/290?vs=313
the gtx 460 will be slightly better than its shown in there because its got a better cooler so will overclock further, but the 6870 looks like better value for money in my eyes. feel free to stick with the twin frozr GTX460 if you want though
hard drive: the western digital black is incredibly overpriced for what it is (not OcUK's fault, its expensive everywhere). the seagate performs on par with the WD black and is a hell of a lot cheaper. theres no problems with reliability with them either.
cooler: the gelid has similar cooling to the corsair, is quieter, cheaper and smaller. not sure how they managed it but they did
RAM: wasnt sure if you needed any so i chucked a 4GB kit in there. 1600Mhz is the performance/price sweet spot right now, and RAM timings make almost no difference to sandybridge processors.
oh, and last but not least, heres a couple of benchmarks to make you feel better about the PSU choice:
http://www.anandtech.com/bench/Product/301?vs=314
this shows that when the entire system is being stressed to the maximum with furmark (a program known for using a lot more power than even the toughest of games) that with two of either card in crossfire/SLI you will be using a maximum of 510W. you could technically get away with a 550W PSU if it had enough power on the 12V line, but the 650W PSU gives you a nice bit of headroom
hope this helps you see why ive made the changes i did
