Simply to many best setups to mention:
But my dream machine was this, i said was because i didn't go the whole deal, some parts i got cheaper, for instance the graphics i got instead a 6800GT & my HDD is 200GB and LCD only 17". But hoping one day soon i have the same setup as below.
Motherboard - Asus A8N32-SLI Deluxe
CPU - AMD Athlon FX-57
RAM - 2GB Mushkin XP Redline PC4000
Cooling - Swiftech H20-Apex Liguid cooling kit
Power - Turbo- cool 850 SSI 850W PSU
Video - 2x XFX Geforce 7800GTX 512RAM in SLI
Sound - Creative X-FI Elite Pro Sound Card
Speakers - Creative Gigaworks S750 7.1 THX
Optical 1 - ASUS DRW - 1608P2S DVD Burner
Optical 2 - Samsung 16x DVD ROM
Storage - 4x Seagate 500GB SATAII 7200rpm 16MB HDD
Display - Dell 3007WPF 30" LCD Monitor
Case - Lian-Li PC-V1100B
KB - Logitech G5 laser Mouse and G15 Gaming K/B
Although sound and mouse is not important unless you want nice surround sound then a average sound card and typical mouse will do.