Handlebars are a personal decision. We can give you suggestions, but the decision is yours. Last time I checked there were about 4,000 styles of bars and combinations of bar/bar ends to choose from. Depending on what you choose, you may need to get compatible brake (not "break") levers/shifters, so there could be some extra expense involved - but it's your cockpit, your choice. I have generic mountain-bike flat bars with long(er) bar-ends pointed out, and it gives me about a thousand available hand positions and allows me to sit up so I can see everything.