Agree with LJx that the overall spec isn't looking too bad. OcUK are a bit dearer once you add in delivery costs (assuming no free delivery) but I've always had a good service from them. I would however make a few changes to your build. If your not planning on doing any (serious) overclocking (esp as i3's don't allow it) then don't bother with a custom water loop. High end air coolers are better but if you really want water then consider a closed loop water cooling unit. I've got the Antec Kuhler 620 and cooling performance is excellent and it performs virutally on par with the more expensive double radiator Corsair H70 (and that's with just the single stock fan, in push/pull config with a couple of aftermarket quite high airflow fans it's very very good).
Get a reputable branded quality PSU, that OcUK one is cheap and nasty and won't provide anywhere near 750W.
Don't expect and gaming performance without a dedicated graphics card.
8GB of RAM can be had for £35. Will make a big difference in CAD work.
I would persoanlly forget the whole custom water loop and put your money towards better higher performance components. Given you've selected the i3, I guess your not really interested in overclocking - if so even the stock fan will do for you.
Hows this spec for top end of budget,
Your basket
Product Name Qty Price Line Total
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - Retail Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - Retail £179.99
(£149.99) £179.99
(£149.99)
Iiyama ProLite E2409HDS 24" Widescreen LCD Monitor - Black Iiyama ProLite E2409HDS 24" Widescreen LCD Monitor - Black £149.99
(£124.99) £149.99
(£124.99)
EVGA GeForce GTX 460 Superclocked 1024MB GDDR5 PCI-Express Graphics Card EVGA GeForce GTX 460 Superclocked 1024MB GDDR5 PCI-Express Graphics Card £107.99
(£89.99) £107.99
(£89.99)
Gigabyte Z68XP-UD3 Intel Z68 (Socket 1155) DDR3 Motherboard Gigabyte Z68XP-UD3 Intel Z68 (Socket 1155) DDR3 Motherboard £99.98
(£83.32) £99.98
(£83.32)
Antec Kúhler H2O 620 CPU Watercooler (Socket Intel LGA 775 / 1155 / 1156 / 1366 / AMD AM2 / AM3 / AM2+ / AM3+) Antec Kúhler H2O 620 CPU Watercooler (Socket Intel LGA 775 / 1155 / 1156 / 1366 / AMD AM2 / AM3 / AM2+ / AM3+) £43.98
(£36.65) £43.98
(£36.65)
BeQuiet Pure Power L7 530W '80 Plus' Power Supply BeQuiet Pure Power L7 530W '80 Plus' Power Supply £39.98
(£33.32) £39.98
(£33.32)
Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/8GX) Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/8GX) £35.99
(£29.99) £35.99
(£29.99)
BitFenix Merc Alpha Gaming Case - Black BitFenix Merc Alpha Gaming Case - Black £32.99
(£27.49) £32.99
(£27.49)
Sub Total : £575.74
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £19.10
VAT is being charged at 20.00% VAT : £118.97
Total : £713.81
Much better overall spec.
*edit*
faster RAM will not make any noticable difference in performance, get 8GB of 1600MHz, 2x4GB.