Thought I would throw my two cents worth in. I bass fish 99.9% of the time and actually use both spinning and casting tackle on most every trip. I find I can work some baits better with one set up over the other. The spinning tackle is extremely useful on windy days with crankbait, small jerk bait, etc. We have a good population of smallmouth in one of our area lakes and the finesse typpe worms are easier for me to handle on the spinning tackle. The most wieght I use on this set up is 1/16.
To me, the choice comes down to what you feel most comfortable with and have confidence in for a given situation. Lets face it, confidence and concentration are what make great casts and detect the slightest bite.
My opinion, for what its worth.