no one can answer that question except for yourself. the benefits of a component set is that they are more dedicated than coaxial speakers. they do require more room and sometimes they require a little fabrication for placement of the tweeter if your vehicle doesn't have stock locations for them.are component sets worth it?
if you aren't amping your speakers then you will want to stay away from seperates....as they usually require a little more juice.
In general, seperates are going to give you a much more full sound than a set of coaxials, but, in a vehicle like yours, with the top off, I doub't will ever notice it....but again, that's something you will have to decide for yourself because no one else knows EXACTLY what your listening tastes are like...
also, keep in mind that with seperates you will have to find somewhere to put the crossover.