I have been building my collection of desktops as well.
Thermtake Lan box, 4gb DDR2, 2.66 intel quadcore, SSD
Alienware Predator 2 case, AMD 2.4 dual core, 4gb gaming ram DDR 2, SSD
Alienware hanger 18 case (working on filling it right now as my media center)
Alienware x51 ( have most of the parts, still deciding on motherboard and cpu)
Old P4 gateway case (2.6 AMD dual core, 4gb 3500 DDR1, SSD) (just updated this case from the guts of my Voodoo Hexx)
HP desktop (2.3 AMD dual core, 1.5gb ram DDR 2, I just retired this one and looking for it a good home Missing power supply and SSD)
Newest mini ITX build 4.4 AMD Quadcore, 8XXX series graphics, 8 GB DDR3 16000, SSD and HDD
Voodoo HEXX (i7 920, 6 GB DDR 3 1333, SSD)(Just put it together, having issues with it booting, still working on it)
Voodoo Rage F1 (Phenom 2 x 6 2.7 ghz, 8 GB DDR 3 16000, Dual X25 160 GB SSD, 7770 graphics (second 7770 is on loan and I am waiting on it to come back, lowest windows 7 score is 7.3)
Voodoo Rage F1 (empty case, but it is the fabled signed case, only empty case to leave the voodoo factory, signed by all the employees, WOW give away for the first one that reached level 80, It will be getting a very good set up soon, it is a one of one item)
HP mini-Itx (core 2 duo 2.0, 2.5 GB ram, SSD, 6570 graphics)(looking for the perfect travel case for it)
The oldest boys desktop is still his custom AMD case, but now has put intel guts in it. i5 water cooled over clocked to 4.2 ghz per core, 16 GB DDR3, 120 GB SSD and 4TB HDD, 760 GTX.
Including the AM1 set up I am looking at I have 4 other mini desktops.
CF-28 MK2,Mk3 / CF-29 Mk3 / CF-30 MK2 / CF-25 Mk1 ATI / CF-19 MK3/Mk3/Mk5 / CF-U1 Mk1,Mk2 / CF-M34 Mk7/Mk3 / CF-17 Mk1 / CF-07
Voodoo Envy M355 / M360 / M515 / M780 / U703 / Voodoo Hexx / Voodoo Idol / Voodoo Rage F1 / Voodoo Rage F1 / Voodoo Rage F1 "signed case" / Voodoo Omen
Alienware M11x R1