Suzuki 150cc japanese assembled(no comparison of any other bike in paki),the most powerful bike which will not disappoint you in any aspect.But if you prefer looks over power then go for unique ud-100 which has sports look...16 litre fuel tank,self start,front wheel disc brakes etc..
I had personal exp with ud-100 2011 bike.Its very stable and comfortable even at high speed.No vibration at high speed.
Btw i've heared dyl 125 2013 is also awesome bike.