[New Build] £250-300 Case (no psu), CPU, RAM, Motherboard

Approximate Purchase Date: (this week (unless something is round the corner))

Budget Range: (e.g.: £250-300) Case (no psu), CPU, RAM, Motherboard (discrete graphics card next month)

System Usage from Most to Least Important: (Computer Aided Design, Rendering, Transcoding, Counterstrike Source (no other games), Audio Creation, Small LAN Server)

Parts Not Required: (e.g.: keyboard, mouse, monitor, speakers, OS) Re-using EVO 650W Power supply P/N EP10N1 (temporary power supply while using onboard graphics)

Preferred Website(s) for Parts: (e.g.: ebuyer.com, kustompcs.com)

Country of Origin: (England, United Kingdom)

Parts Preferences: by brand or type (ATI for Ubuntu graphics support using open source drivers, Nvidia for closed stable gnu/linux drivers, Intel for potential use as hackintosh later down the line. AMD for performance/price in Mid low range). Intel (again for potential as Hackintosh and if it doesnt cost the earth Quick Sync for rendering).

Overclocking: Yes (what ever the board will do at the push of a button, not changing voltage etc manually)

SLI or Crossfire: Maybe (later down the line when I have saved more cash

Monitor Resolution: (dual screens after buying discrete card at 1280x1024, or above, preferably around 1600x1200)

Additional Comments: (Lots all below)

I'm looking to build a new system and wanted to run a couple of things
by you. I've been hunting around for a month and get more confused with every passing day. As Im the sort that only buys a new computer when the old hardware fails (6 years on the last system) I am really looking to future proof on a budget. Thats why so far I have only come up with an AMD build due to budget. I gave myself £250 for Case (no psu), CPU, RAM and Motherboard. However Im willing to push this if it will give me a solid machine that will do the following things well for the next 5 years..or more.

1. I dont game apart from Counterstrike Source
2. I will be rendering, transcoding, 3D Modelling and pretty much all other design tasks though these are the most resource intensive.
3. Would want to start off with Ubuntu with WINE using integrated/onboard graphics, 1 as a backup and 2 allowing me to save up for a great discrete graphics card.
4. May also set up as a small server to distribute content (but this is for testing and not enough to require a server board).
5. SP/DIF optical audio ouput

Here are the parts I have found so far:

http://www.ebuyer.com/product/246639
Antec One Hundred 100 Case (cheaper than the 300 with most of the trimmings)

http://www.ebuyer.com/product/236462
Asus M4A88TD-V EVO/USB3 AMD 880G (probably not going to use a quad GPU setup maybe not even crossfire so not sure i need 890 chipset, have read issues with some of the ASUS boards and wondered if this one is very stable?)

http://www.ebuyer.com/product/180490
G-Skill 4GB (2x2GB) DDR3 1600MHz Ripjaws Memory Kit CL7(7-8-7-24)
1.6V (Quality Vendors List F3-12800CL7D-4GBRM (XMP) has xmp in brackets but im sure this is extreme memory profile to do with Intel or just the way it looks?)

http://www.ebuyer.com/product/238326
AMD Athlon II X3 450 3.2GHz Socket AM3 95w 1.5MB L2 Cache Retail
Boxed Processor (Apparently its easy enough to open a stable 4th core on
them if your lucky so looking for a bargain here)

Any ideas on this?
Looks like its to long to wait for Bulldozer cores but am i just investing in very old architecture here?
Should I wait longer, however after recent events in Japan i can already see some component prices beginning to rise?

Last system was an Athlon 3000+ venice core, 1 Gig OCZ DDR ram, DFI Lanparty CF-DR and an Saphire Ati x800/850 GTO card so whatever I buy I should be happy with the speed increase.

Cheers.