Athlon 64 FX-55, ASUS A8N-SLI Deluxe mobo (nForce4 chipset and SLI config.), 2gb RAM, 2 6800 GT or Ultras, 3 74gb WD Raptors in RAID 0, and tons of sick case mods. all that if i had unlimited budget...
If I had an unlimited amount of money:
Either an Asus or MSI nforce SLi board
2 gb of pc4000 ram or maybe a lil lower speed
2 6800 ultras
3 74gb raptors in raid 0
audigy 2 zs platinum pro
Some sick ass case with water cooling
Some awesome logitech cordless keyboard and mouse
Some awesome 5.1 logitech speaker set
Uh that's all I can think of right now, but yeah
oh yeah i forgot about the sound card and cooling. basically add the creative audigy 2 platinum pro (a nice creative 7.1 surround sound speaker set too!)and the prometia mach 2 phase change cooler to my list above...