All three colleges, Dayananda Sagar College of Engineering, Techno India Salt Lake Sector V, and Haldia Institute of Technology are very popular colleges to pursue ECE. After careful consideration, I would say that Dayananda Sagar College of Engineering (DSCE) is the best among the others mentioned.

• Dayananda Sagar is now an autonomous college and there are a lot of facilities available for the students. 
• The placement opportunities available are excellent. Many reputed companies visit the campus for interviews. Being located in Bangalore, it has a location advantage. 
• Industry visits, seminars, and internships are plenty. This can be a very good opportunity to gain some work experience and knowledge. 

Hence, Dayananda Sagar College of Engineering is a better college than Techno India and HIT as it offers better placements and facilities to the students. Also, as the college is in Bangalore and staying there could be expensive. The living expenses and travel costs are extremely higher than usual. So prepare accordingly.