handlebars:
i believe your bike comes with straight bars, so you're other options for multiple hand positions are: drop bars, bullhorns, and mustache bars. Riser handlebars could be an option too, but they don't provide multiple hand positions, and aesthetically don't differ tons from your stock flats. You also could trim down your stock bars if you feel they're too wide.

pedals: many people around here, myself included, are a fan of the MKS line. Personally I like MKS GR-9s, which are a bit platform-ish, and feel good with softer-soled shoes.