Third on the Q9450 vote. A Quadro is the way to go (although I'd only do it if you're getting paid - nicely- for the work you'll be doing on the graphics side), otherwise the 8800GT or 9600GT should fit the bill nicely. Don't get the Raptor. Go for either 7200.11 or 3200/6400/7500AAKS Western Digital HDD. Don't get the Samsung you listed. If you're doing graphic work you need an S-IPS or S-_VA panel, the Samsung 245T should fit the bill (and be inside your rather large budget). You're not overclocking, so DO NOT waste your money on an after market cooler (unless you're a quiet freak, and in that case let me know and I'll point you in the right direction)
8800GT is a better card than the 9600GT. I know it's kinda counter-intuitive, but it's true. Stick with the 8800GT if it's still in the budget, or if you're looking for cooler/quieter operation the 8800GTS 512MB is the way to go.
My brother owns the 245T and is infatuated with it. He's an Industrial Designer and does a fair amount of graphics on his home computer. The buzzing thing seems to be a hit-or-miss as reviews go, but it's a definite plus to not have a TN-based panel for color spectrum and replication.
I would not go for an on-board based wireless solution. I haven't heard much good about them (and almost all the examples are made by Asus, go figure - who's a great company otherwise). Pick a PCI-based card from a major manufacturer (Linksys, D-Link, Netgear) and a different motherboard (the DS3L is by far the most popular).
To the person that states the on-board Firewire as a plus: it's a dying interface and the OP did not state they have any need for it. That's the case of buying a board with features you'd never use (if indeed the OP doesn't own any devices that utilize it).
Zalman coolers have been surpassed in the past year. The performance they offer is no longer comparable to newer designs. Xigmatek, Scythe, Thermalright and Cooler Master offer better bang/buck. On top of that, if you do not plan on overclocking, do not get an aftermarket heatsink. If you're planning on overclocking, or you're looking for low-noise computing, let me know and I'll provide you with a recommendation.