Ok, I've been getting a lot of advice on these forums, and I've made some decisions. Im a big multitasker, with a lots of graphics, web and office software, as well as premiere and music editing stuff on occasion. Don't really do games, and never going to do overclocking.
I've chosen the following setup - can I have some constructive criticism/confirmation:
Q9550 with an Intel DP43TF board.
Coupled with 4 gigs of good ddr2 800
With a ATI Radeon HD 3850
You should be fine. I use corsair, crucial, or samsung memory. The better stuff has 4-4-4-12 timings, but 5-5-5-15 will also work fine. Fry's and newegg have some pretty good prices. Also check fatwallet or slickdeals.
Looks good but I would consider changing a few things.
First off, exchange the 3850 for either a 4670 or 4830/4850.
The 4670 should cost a little less than the 3850 and offers nearly the same performance.
It is also extremely low power drawing under 60w when fully loaded.
For not to much more, you can have a 4830 or 4850 which will give you a much more powerful GPU.
I understand you do not wish to game but I also understand the latest CS4 suite can take advantage of the GPU to speed up all sorts of tasks.
Secondly, RAM is cheap and you are going to be using a lot editing videos.
Go for 8Gb and make sure you are using a 64 bit OS.
Looks good other than that although you should reconsider your stance on overclocking.
You can easily and safely increase your performance by quite a bit with little/no risk.
You would have no issues running at 3.4Ghz or higher, likely on stock voltages, just by changing a few BIOS entries.
In any case, it will defiantly be a good multitasking machine and I am sure you will be happy with it.