Processor x2 = 614:
http://www.newegg.com/app/ViewProduc...103-422&depa=0
Mobo = 220:
http://www.newegg.com/app/ViewProduc...130-436&depa=0
Ram = 273:
http://www.newegg.com/app/ViewProduc...146-940&depa=1
Hard Drive = 119(72,000 RPM, 200 GB):
http://www.newegg.com/app/ViewProduc...144-324&depa=1
DVD Burner = 50:
http://www.newegg.com/app/ViewProduc...151-211&depa=1
CD Burner = 24:
http://www.newegg.com/app/ViewProduc...106-823&depa=1
Video Card = 184 (FX5900XT):
http://www.newegg.com/app/ViewProduc...130-208&depa=0
Is 1484 + your 100 = 1584 (without tax and shipping.... which sets you a little over)
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You could sub that video card for a Radeon if you wanted:
Video Card = 159 (9800 PRO):
http://www.newegg.com/app/ViewProduc...131-278&depa=0
Bringing you to (including your 100) 1559 (which would still put you a bit over 1600 including tax and shipping).
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Another option would be to downgrade the processors slightly and get a better video card.
Processor x2 = 408:
http://www.newegg.com/app/ViewProduc...103-388&depa=0
Video Card = 419:
http://www.newegg.com/app/ViewProduc...130-208&depa=0
Which would bring you to (including your 100) to 1613 (which is definately over your 1600 budget with tax and shipping).
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Another option (for more speed and less capacity)
Hard Drive = 112 (10,000 RPM, 36.7 GB):
http://www.newegg.com/app/ViewProduc...144-200&depa=1
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I guess all of my suggestions take you over the cap... Um... you could get the slower processors and the lower-end GeForce which would put you a couple hundred under leaving room for tax, shipping, and cooling.
Let's see, that would be... 1378.
I don't know how much liquid cooling costs... ~100?