Hi Nuval.
Iam a big fan of bow hunting and own a Mathews Z7, shooting at 75 pounds. I have used it extensively from small animals such as duiker up to kudu and on hardier animals such as bushpig and wildebeest. There is no one exact correct bow for africa as there are so many variations. Thankfully there is alot of info on the net with regards to bows, broadheads, arrows etc...that will give you a good indication as what is suitable. So I won't delve into all the finer details of bow hunting (i'll leave that up to the real "fundies" as we say here) but I will give you some advice that I use when bow hunting. A little research before hand can go a long way, such as will you be hunting out a tree hide or ground hide, walk and stalk, what range are you comfortable with at taking a shot at an animal? These types of info you can find out from the Outfitter you will be hunting with and will help to determine what bow will suite your situation.
Be considerate of the animal, you want it to be a clean good hit that does enough damage to put the animal down. You don't want to go too light a bow that doesn't provide enough penetration, so as a PH i would be "slightly" hesitant to put you onto an Eland with a 25 pound recurve bow.
Practice, practice, practice as much as you can and thats not just for Bows but any form of hunting.
Im sure there is enough guys on this forum with invaluable info on bow hunting in Africa but to sum up my 2 cents would be the right bow for Africa is one that provides sufficient penetration (double lung shot) on your desired animals at a distance that YOU are comfortable shooting from.
Hope that helps and when you do head out on that hunt, all the very best and good luck.
Cheers
Jono