With the accelerator on the steering wheel you eliminate the steering knob...might wan to try and see how that works for you first. I know I don't use my steering knob when driving on the open road but when it comes to parking/parking lots, I wouldn't want to be without it.
I wouldn't decide on hand controls by the look factor but by the purpose factor.
Btw, the exact location your hand will be in to operate the brake (for the hand controls you want - Digital Accelerator Ring DARIOS and the Main Hand Brake) is the exact location most hand control levers for gas/brake are. So either way one hand will be there the vast majority of the time you are driving. The difference is with the DARIOS you have no knob to steer with when needed.