You can zero by way of filtering out..
As per the current trend, Aakash and career point are not one of the best options.., so, you can rule them out..
Remaining are Allen, Resonance, Motion and there is also Vibrant..
The main thing is faculty..
I would suggest you to try to find out, which batch you would get if you join a coaching institute, the names of the faculties.., their reputation..
After gathering this info, you may be in a better position to decide..
Also consider, the accommodation, food option, moral support..
PS: If i were in your position, i would have considered joining a good private engineering college instead of spending another year to prepare.., or a non-engineering option..