I purchased a new Trek Dual Sport 3 on Friday and I love it so far. I have bad shoulders (rotator cuffs) and need a more upright ride, and the first day I rode it the bike felt perfect - no strain on my shoulders compared to my last bike. However, I realized the seat was too low, so I adjusted it up about an inch and a half, which makes the pedaling perfect, but now I feel like I am leaning too far down to the handlebars, putting too much pressure on my shoulders on longer rides. I've read a lot about changing stems or changing to a "riser" handlebar, but wanted to hear which option people think is simplest and most effective (and/or cost-effective) option to do first. What's the best way to move the handlebars about 1.5 - 1.75 inches (38mm - 45mm) taller?