both MBA for light duty, macbook pro 17" (older core 2 duo, 8gb, ssd+hd) for 1920x1200 matte screen
old macbook air + sata ssd = $600 used (applecare 1.5 years left when bought)
old macbook pro core2duo 2.66 + ssd + 8gb (1920x1200 matte screen) with 1.5 years applecare left = $1300
also a year or so ago i picked up $1900 a mac pro with 2 quad core nehalem (4 core 8 thread each) system with two velociraptors and a cheesy gt120 card - easy to add HD 5870 hacked as second video card $150~ - going to move to dual SSD raid-0 - this is the 4,1 but you can flash it to 5,1 to use the newer westmere 6 core 12 thread cpu's Love it. Great for running many VM's of osx for other users to RDP into. Need to figure out how to run esxi 5 on it and see if it will met me fake the SMC to run tons of osx vm's on it applecare was 1.5 years left when i got it too. Original receipt was like $9K (!?!?)
Gotta love apple products when you score a deal (relative to when i got them).
MBA = most used hardware of all i own ..