Colleges in Rajasthan

IIT, Kharagpur is the best in overall comparison because it is a government institute ranked amongst top 10 institutes. BITS is ranked after IIT Kharagpur the fees of IITs is lesser than BITs. You will get good exposure in IITs as compared to BITS.

You may refer to the following link to have some idea about BITS cut off in various branches in various locations:
http://bitsadmission.com/cutoffscores.aspx

JNU is a state private university created under the state government private university act by Rajasthan state government. The University is recognized by UGC under Section 2(f) of UGC Act 1956. Therefore, you are eligible for government jobs and higher education in India and abroad.

BITS Pilani is famous for its engineering degrees. Its management program is very old but does not command same value as engineering degrees from institute command in the market. It is still a better option than most of the private Tier II and Tier III small B-Schools.

I think if your CAT percentile is around 65%, you would be on safe side.
Best of luck