Wireless bridge hardware

Hi,

I am currently using a Senao/EnGenius EOC-8610plus.
Senao Networks, Inc. 神準科技股份有公司

I have two of these units which form a wireless bridge which makes the LAN in our office available to a second building next to it (about 50m away with a clear line of sight).

I have had numerous problems with this product, it will reset to its factory default settings without warning, stop broadcasting, stop responding completely, connect only intermittently etc. I have had these units repaired under warranty many times, but I have decided that I can no longer afford to use such an unreliable piece of equipment in our network.

I have looked around for a replacement, which needs to use 802.11a 5 Ghz frequency and support PoE. The following products look like they would be suitable:

Repeatit SU-5410
Repeatit SU-5410a Outdoor 802.11a 5GHz Bridge Kit | Repeatit SU-5410a Bridge Kit

3Com 3CRWEASYA73
3Com® 11a 54 Mbps Wireless LAN Outdoor Building-to-Building Bridge and 11b/g Access Point 3CRWEASYA73 - Product Specifications

Has anyone had any experience of either of these products, and could they recommend oradvise against using them, or is there anything else which would be suitable and reliable?

Thanks

Nick