Cisco AP selection

[arshad_khan]

Hi, One of my client needs 3 AP installed in one location without wireless controller but he also needs maximum features available in terms of security and mobility.
Kindly suggest which AP having all those features.

[Leo Laohoo]

but he also needs maximum features available in terms of security and mobility.

Define "maximum features". 

I mean "PSK" can be considered as "maximum features" but if the PSK is just "password123" then it's not really safe, is it? 

Next question, what is the budget?