First of all I would like to congratulate you on your achievement. Looking at your question of which college is best for cse  . The college's you suggested in questions are all great on there place.  Amrita is 'A' Certified Engineering College with Software based Teaching and had great placement records with multinational companies. Each and every campus of it is based but Amrita Coimbatore is best college for any Engineering program. This campus of Amrita has AAAA+ Certification which make it best and slightly better than others.

Hope this may help you