Did you ever think of ripping of the plastic bezels of your monitors?
You may end up like:
Samsung MD230X3
For example: If you buy a 3x Asus VH242H
and rip of the bezel , you will end up with 0.5 cm bezel per monitor:
http://www.tomshardware.co.uk/forum/...ezels#t2009745
Thats more then half the price of the samsung MD230x3