In my opinion it is LPU because if you are a hardworking average student and want to go for immense opportunities and exposures then LPU is the best option ,it provides quality education at reasonable cost and unbeatable placements.
Since these three colleges which you have listed are the top private universities of India. We can't directly say any college best but yaah we can compare these colleges through many factors like :
- Ranking wise VIT > SRM > MANIPAL
- Placement wise VIT = SRM = MANIPAL
- Collaboration with other foreign universities and industries wise SRM = VIT > MANIPAL
- Strength of students in respective branch wise VIT = SRM = MANIPAL
- Average package wise VIT = SRM = MANIPAL
- Quality of education and infrastructure of studies wise VIT > MANIPAL > SRM
So, it totally depend upon you on what factor you are looking for any college.