Welcome onboard bitcointalk platform. It is nice You accepting bitcoin as a means of payment this is what we are looking for here news of this nature steers up more actions from other members to follow suit too. I commend you for that. You asked about recommendations for exchange which I believe you are looking for a means of trading or possibly converting your coin to Fiat which is ok. There are lots of exchanges available as mentioned by one of the posters above and you can choose from them any that suits you right. You can also look for their reviews to know what people are saying about them and how reliable they are to deal with. I will also advise you something and it is a known phrase which says " not your keys, not your coins" in as much as you are trying to play safe by protecting your assets, you should know that exchanges are third parties which means anything under their custody belongs to them and you are not sure of their safety. With what has been happening with exchanges of lately it would not be advisable to hold you assets with them rather create your own wallet and take custody of your assets.