Ok what you don’t want to do is go from one bit of crap to another.

Have a look at the following. Read the white papers for the devices before you choose.

In my opinion this is what I would buy.

1st expensive but i think the best is the Intermec 2102
Great security/ forward compatible/ easy to upgrade/35 years of wireless experience

2nd also expensive Cisco 35x AP
good name/ great power out put 100mw

3rd Orinoco rg-1000 cheap but an easy going card in it. Orinoco gold/ cheap/ easy for spares

Checkout the report I received from a test.
www.veteransmc.com/wireless.htm