Dual 27" Monitor Arm question

Hi!

I'm looking to get a dual monitor arm to mount 2 27" screens. I know that there are plenty of them to choose from, but I am trying to find one that would work with my desk being right against the wall - the arms can't be rotated backwards and go over the back of the desk when the monitors are side by side and also kept as close to the wall as possible. If it's relevant I'm looking to mount 2 BenQ GW2760HS screens. If anyone has a similar setup that works I would appreciate some suggestions. Preferably something not too expensive ( :P ).

Thanks! :)