There are many things to consider when looking to move to a wireless network,,, judging by the post, this is a new building,,
things you may wish to consider are :
Power Lines and Grids in building
Frequencies of other peripherals
Distance & Construct vs signal strength
I believe that wireless does prove to be flexible,, I run wirelessG at home, and the only thing I have to worry about is when someone goes on the phone during a download ( they are at the same frequency)
Look into the BlueTooth technology,, they seem to tooting it as "THE" choice in wireless,,
The difficulty in this Post is that EVERY project is a variable,, due to construction layout, materials, locations , design, etc...
Check with Vendors,, they may offer you valuable insight if you provide the layouts of the project,
MCSE, MCP+I, A+
\"You\'re the Disease, and I\'m the Cure!\"