Wireless security, again... Point to point links

Hi!
I have a electric power company that don’t want to use wireless links in the license free 5 ghz band, because of security issues.
The issues is mainly that the wireless data can easily be picked up and decrypted. They have this from the old WEP days, when wireless point to point links was new…

My Q is how safe are the data, then using a WPA2 PSK AES, with strong passwords? (as found at http://www.grc.com/passwords.htm)

Can I use IPSEC/L2TP between the links? Or is it overkill?
Other PPP protocols that is good for better security?
Nstreme or NV2?

Is there any white papers that I can refer to about wireless encryption?

Anyone who have some thoughts about this?

This is a decent read about the general tools that are publicly availble to crack wireless security.

http://www.tomshardware.com/reviews/wireless-security-hack,2981.html

You can ‘harden’ the links a bit more by using Mikrotik propierty protocols it isn’t really more secure but it makes it that much harder for just regular ‘Joes’ to attempt to break into the link.

Past just the security of the wireless link, you could furthur encrypt the data inside of a tunnel (IPSec, PPTP, L2TP, etc.)

Is it enough? Well I guess you have to convince them of that.

Cheers

Thanks, great reading.

Exactly what I was looking for.