I agree with Scataphagos that these "trading" computers made by EMC or XView or the likes tend to be priced much higher than what you can get if you build it yourself. Of course, that's their profit margin. Usually about 40% from what I estimated.
I recently built a similar box to drive 8 monitors.
http://www.elitetrader.com/vb/showthread.php?s=&threadid=195662
The box, about $1200:
- Chassis
- i7-930 processor
- 6GB memory
- 1TB disk drive
- DVD RW
- 600W power supply
- (Exclusing keyboard and mouse, but those are trivial)
Display cards: PNY Tech 8400 GS, dual head each x3: 3 x $60 = $180
Win7: maybe $100
Samsung 22" monitors, about $200 each. 6 x $200 = $1200
Monitor stand... if you want to be nice and neat: maybe $500, my estimate.
Added together: $3180 total
EMC price $4497
Building your own computer is not for everyone. Others said that you don't have warranty and all that. True. But these are all off-the-shelf components that you can pick up at Fry's or other similar electronic stores. Faulty components? Just return or swap it out when broken. It could be a fun project if you have a teenage kid who is interested in computers. Building a computer from components is much easier these days.
Hey... one trade you get it back.
Or... that was easy. Treat yourself and your spouse/kids to Morton for a steak dinner for a job well done. Multiple times!
The choice is yours.