My upcoming machine is basically the biggest XI-Machine but expanded with some neat things:
2x 2.93 GHz Intelยฎ Xeon X5670 2x6Cores
48 Gb Ram
150 Gb Raptor sysdisk for music, 150 Gb raptor sysdisk for SAP and MC Visual Studio etc. Not dual boot, but as swap disk.
2x1Tb Raid 0 for Audio
3x256Gb Crucial RealSSD for sample libraries ( VSL Cube, Imperial and Ivory )
Hardware raid controller SAS/ATA 6Gb/s for the SSD
1 Tb HD for other libraries
HD5450 Eyefinity Graphic card
Extra TI firewire card
Everything is passive cooling and dampend.
Should be able to handle just about anything I throw at it - in fact I feel obliged to share that kind of computer power, so I am going to join some research networks, so that they may use it whenever I am not.
I am looking forward to get it [:D]