With 10 mb is enough, the question is whether the link can be made. Bandwidth is not a problem.What are your Needs for this Links?
Thanks, discarded the mAP Lite, I will use a more powerful model.40 clients is quite a lot.
Why are you looking for the smallest/cheapest possible device with small antennas and targeted as personal AP?
What is the area of your clients? One big room? One floor? Several buildings?