Network Computing reviews thestate of 802.11a gateways. Their winner was a Proxim Harmony, a fairly expensive unit at $695. Netgear and Linksys had poorly performing units, costing well under $400 (for the SOHO market). The Netgear is powered by an Atheros chipset, but I'm unsure what 802.11a chipsets the other products use. UPDATE: Jim Thompson (Musenki wizard and former CTO of Wayport), notes that all of the reviewed designs are based off of the Atheros reference design.