Well, Centrino isn't a processor. It's a mobile computing platform. Do you mean the new Core 2 Duo perhaps?
Under $2k? It can be done...actually, what I've come up with is about half that plus shipping.
Motherboard:
MSI P965 Neo-F $86.99
CPU:
Core 2 Duo E6600 Retail $308.00
RAM:
Corsair XMS PC6400 2x1GB kit $158.00
Video Card:
PNY Quadro FX560 128MB PCIe $269.99
Optical Drive:
Pioneer DVR-112 18x DVDRW $31.99
Power Supply:
Enermax EG565P-VE 535W $84.99
Case:
CoolerMaster Centurion 532 $49.99
Display:
BenQ FP92W 19" LCD $179.99
Total: $1,169.94
I've used one of those Enermax EG565P-VE's in my main box for about two years now, and it's been a real champ. I don't know what you have now, but a good power supply is worth every cent, so don't dismiss it. I also just picked up that MSI P965 Neo-F on the list. It's been a flawless performer, but it is a basic board, so if you want more frills, it's probably not the board for you.
I'm not as knowlegeable on workstation cards, but you'll want to look at ATi's FireGL or nVidia's Quadro line. It's not that their Radeon or GeForce line can't do it, but they're not designed with workstation graphics in mind.
The E6600 Core 2 Duo is about the sweet spot for price/performance. The next step up is an E6700, and that commands an extra $200 for an extra 266MHz.
You didn't mention any optical drive, so I tossed in the Pioneer DVDRW unit. I don't have that unit, but I do have a couple of their previous models, the DVR-109 and DVR-111D, both of which have been very solid drives.
I started off with 2GB of DDR2, but given your line of work, you might even want 4GB.
The case is there as a stylish, inexpensive option. Your tastes might like something else, and as long as it's an ATX-compatible unit, you're fine.
I did toss in an LCD monitor, but I'd strongly advise checking out your display before purchasing. Along with audio preferences, displays are subjective to the person using them, so what I might like may not be up to your standards. While I've heard good things about BenQ displays, I've never seen them in action.