When choosing an engineering college, it is always somewhat better to have your options, but at the same time, stick to government-run institutes. That clarifies most of the issues here. NIT Silchar and NIT Tripura are both prominent institutes to choose from. 

Few others, unlike them, are mostly on the higher lists of popularity because they have their name inculcated as NIT. However, you should never feel left out if in any case you do not get acknowledged on grounds of NIT. The other best possible option, just second to NIT, is KGEC. 

Although, there is a short list of people who actually end up recommending any private institutes in lands of West Bengal.

If you anyhow need to get enrolled in any of the private institutions, then going to institutes that are deemed well known, such as SRM, KIIT, Manipal can be some other good options from your pocket.

If not any of them, then choose going to COMEDK or try enrolling in other renowned private colleges in Bangalore, some of which are RV College of Engineering, PES Institute of Technology, BMS College of Engineering and MS Ramaiah Institute of Technology.

There is another information yet to share which is, unlike BITS-Pilani, BIT-Mesra and MIT-Manipal,IEM is known to admit various students through management quota which is rather not the case for many other prestigious private engineering institutes.

But, as mentioned earlier, getting to choose from a handful of governmental institutes are better than the latter. However, options other than those few are opened as well.