An AIR-SAP2602-x-K9 with lightweight IOS and a CAP2602-x-K9, what’s the difference? I have 3 pieces of AIR-SAP2602-x-K9 and no WLC, and I need an AP. Shall I buy another AIR-SAP2602-x-K9 or should I wait and buy AIR-CAP after I buy…