I've got a Dutch style single speed bike with sit up and beg/high handlebars but I want to change them because I feel my ride could be significantly more comfortable if I had multiple hand position options. I don't like drop bars so I don't consider that an an option and prior to this bike I rode on straight bars.

I am considering getting butterfly/trekking bars and seeing how I get on with those. The longest journey I'll take is a 18-20 mile round trip but that only rarely

Any other types of bar and what are the pros and cons of butterfly bars