I have a nasty habit of keeping old stuff now, so i tend to collect computers & monitors.
From right to left:
1st gen Powerbook 12"
Linux PC (PIII-550 i think) acting as gateway and fileserver
G4-350
Dual 2Ghz G5
Windows PC (PII-400), under the desk, soon to be FreeBSD.
3 17" monitors of varying ages
15" Sony LCD
And yes, the monitors are all connected to the G5

(This is an older photo, hence the different layout)
The setup didn't start like that, was originally only single monitor with the G4, then dual (nicked it from the PC when it became a gateway), then got the third monitor free and the LCD at a bargin price.
Previous to this, i've had (reverse order)
Performa 6400/200
Performa 630
Atari ST 1040 (with
1MB ram upgrade

)
BBC Master