If you are asking the best college in terms of placements, then Rashtriya Vidyalaya College of Engineering (RVCE), Bangalore is the best in Karnataka followed by PESIT,BMSCE and MSRIT.
If teaching and academics is considered, you can select either of the colleges.All are the same.
If you want a lenient college with lenient rules, them you can select any college apart from PESIT, Bangalore.
Overall,it depends on what you expect from a college, be it placements, good teaching or co- curricular activities.