the difference between 200 watts and 500 watts is not gonna be huge or even pretty significant . you can put 200 watts to some of these 4 pill class C boxes and probaly see a kilowatt on a meter , but how many of those watts showing will be on the frequency your radio is
TX'ing on ?
you have to decide for yourself whats more important to you .
a big (bragging rights) number on a watt meter ????
or a clean clear signal that isnt bleeding all over the place ????
then you will have your answer .