Recommendations for a building to building wireless link

Hi,

I'm looking for some recommendations on kit to buy to create a wireless microwave link of some sort to connect the LANs together of two buildings. The distance apart is about 30 to 50 meters.

Ideally something where both ends would be PoE and would offer gigabit speeds with little to no latency across the link and would have no issues with VoIP Traffic. The ability to support VLAN tagging would be desirable not not essential.

Thanks