Engenius/Senao vs. ORiNOCO

Hi,

I currently have a 3.7 miles link with an ORiNOCO AP500 and a Ethernet WL
converter (both with ORiNOCO Gold cards). The signal is a bit unstable, so
I wonder if I will have a more stable signal with an Engenius CB3 PLUS
DELUXE AP / Client bridge in each end.

Does sombedy have comparison experiences with ORiNOCO and Engenius equipment
and give some feedback on this issue?

Tips about other bridge 200mW+ equipment than the Engenius is also welcome.

regards

Tor