To hit the 2" mark you will need a new top clamp. To go with the new top clamp maybe put some Heli bars on for comfort. pretty straight forward on install. Throw couple towels over the inners. Take both the clutch and brake off the handlebars and let them rest on towels. Remove the handle bars. Remove the top clamp. Take old handlebars and install on new top clamp. install top clamp.then install brake and clutch.
Brocks makes some nice rear adjustables. Black in color. A little more $$. Would look great on your bike. As far as top clamp? It's really a choice of what design you want. Plain, Hayabusa written across it, chrome, powered, etc...
Before lowering your bike. Think about where you going to ride it. Have a steep driveway? Speed bump you won't be able to avoid? Lowering greatly increases the risk of bottoming out. Reverse of knowing the height of your rig and going under bridges HAHA!