Should I Buy 1 or 2 Dell 2009Wt 21" LCD's

[CoolHandL]

So i Have 1 Dell 21.5" 2009Wt LCD Monitor and 1 x 24" samsung 2494SW LCD, its great having 2 monitors,
I have the opportunity to buy another Dell for $50 bucks, its slightly used, now should i buy 2 @ 50? then i could eyefinity 3 x Dell 2009Wt 21.5" LCD's, and have the 24" above the middle 21.5" Dell as a 4th monitor to drop down for single monitor gaming, or should i just buy the one and have 21.5 x 24 x 21.5 ?

thanks for the input!!!!!!!

[lcdguy]

i used to have the following config for my eyefinity.

2x Samsung 2494SW
1x Dell 23"

i couldn't stand the difference in bezel sizes and bought another 2 23" dells.