My current spec is 7 years old (it was cutting edge at the time!) 
XP2200+, 1 GB Corsair RAM, ASUS A7V333 mobo, WD Caviar 80 GB HDD, 5.1 Sounblaster Audigy, Leadtek Nvidia GForce 4 Ti 4200, Dell 19" LCD, Plextor CD RW drive, Coolermaster case (can't remember model, but has a blue plastic door).
OK, now you have stopped laughing
, my budget is around £1000. I do not play a lot of PC games, although I would like the capability to play games like Crysis now and again. I like high quality audio and want the new build to act as a quality source for my headphone and streo amp's. I want to be able to multi task without breaking a sweat (e.g. java based share trading platform with multiple instances, firefox, mp3's, Photoshop). I am also looking for a 26" LCD as I need the space to open up all my trading charts etc..). I would also like the system to be as quiet as possible.
I need almost everything really, including case. Things I can re-use are: Wireless keyboard + mouse and possibly the Plextor CD/RW drive?
So far, all I have done is selected a case I quite like: Lian Li PC-A05B. I am so far out of the loop on the components that I don't know where to start!
I am more than happy to build my own system as I did 7 years ago, but for comparison, I took a look at Dell and saw this for £969. The monitor is smaller than I am looking for, but the question is, can I build something better than this without spending loads more money?
---------------------------------
Components
PROCESSOR Intel® Core™ i7 Processor 920 (2.66GHz, 8MB cache, 4.8GT/sec) edit
OPERATING SYSTEM Genuine Windows Vista® Home Premium SP1 64Bit - English edit
HARDWARE SUPPORT 1Yr XPS Premium Warranty Support - Priority Call In and Onsite Support edit
MONITOR 23in S2309W WIDESCREEN UK Black (1920 x 1080) edit
MEMORY 4096MB (4x1024) 1067MHz DDR3 Tri Channel edit
HARD DRIVE 500GB Serial ATA (7200RPM) Hard Drive edit
GRAPHICS CARD 512MB ATI® Radeon® 4850 Graphics card edit
OPTICAL DRIVE 16X DVD+/- RW Optical Drive (DVD & CD read and write)
---------------------------------
Thanks in advance for your suggestions and help!

XP2200+, 1 GB Corsair RAM, ASUS A7V333 mobo, WD Caviar 80 GB HDD, 5.1 Sounblaster Audigy, Leadtek Nvidia GForce 4 Ti 4200, Dell 19" LCD, Plextor CD RW drive, Coolermaster case (can't remember model, but has a blue plastic door).

OK, now you have stopped laughing

I need almost everything really, including case. Things I can re-use are: Wireless keyboard + mouse and possibly the Plextor CD/RW drive?
So far, all I have done is selected a case I quite like: Lian Li PC-A05B. I am so far out of the loop on the components that I don't know where to start!
I am more than happy to build my own system as I did 7 years ago, but for comparison, I took a look at Dell and saw this for £969. The monitor is smaller than I am looking for, but the question is, can I build something better than this without spending loads more money?
---------------------------------
Components
PROCESSOR Intel® Core™ i7 Processor 920 (2.66GHz, 8MB cache, 4.8GT/sec) edit
OPERATING SYSTEM Genuine Windows Vista® Home Premium SP1 64Bit - English edit
HARDWARE SUPPORT 1Yr XPS Premium Warranty Support - Priority Call In and Onsite Support edit
MONITOR 23in S2309W WIDESCREEN UK Black (1920 x 1080) edit
MEMORY 4096MB (4x1024) 1067MHz DDR3 Tri Channel edit
HARD DRIVE 500GB Serial ATA (7200RPM) Hard Drive edit
GRAPHICS CARD 512MB ATI® Radeon® 4850 Graphics card edit
OPTICAL DRIVE 16X DVD+/- RW Optical Drive (DVD & CD read and write)
---------------------------------
Thanks in advance for your suggestions and help!