I am a hobbyist and once in a while being asked by my videographer friend to take some pictures if his clients need a photographer. recently I bought a 70-200 F2.8 IS ver I. It is sharp wide open, at least to my standards.
Would you advise me to change it to 135L and 200 F2.8L? I guess my concern is more on the convenience of using zooms compared to primes.
Any suggestions and advise are appreciated. Thanks guys.

Your photos just gain so much using primes I can not explain it. Better composition and "pop" for one, and I think it honestly makes you a bit more creative. Even the most boring items at f/2 can look awesome... 

