I use SMCWEB-N's for this purpose. I also tried a DAP-1522, but due to its lack of external antennas and my inability to locate it in a better spot, I never did get a satisfactory signal. The SMC units have 3 antennas and work a lot better for me (and on a positive note, they are also Ubicom-based, like the DIR-655, so compatability is excellent).