If you are interested in Higher Studies or research in same stream then you may go for M.Tech else mba would be a good option. you should have 55 % in B. Tech/BE and a valid score of GATE. I am enlisting a few good colleges for Mtech : IIT Roorkee, IIT Guwahati, DTU, IIT Varanasi, IIT Dhanbad, NIT Surathkal,NIT Tiruchirappalli, NIT Warangal, NIT Calicut, , Lovely Professional University, Jalandhar ,Punjab, College of Engineering, Anna University,DTU,VIT, BITS, IIIT Hyderabad, IIEST Howrah, College of Engineering Pune, Jadavpur University, IIIT Allahabad,Anna University

If you are not interested in learning technology any more , only then you should pursue MBA . You should have cleared any one entrance test ( such as CAT/MAT/XAT/NMAT/CMAT/GMAT/NEST ) and should also have min of 45% to 55% in your bachelors .you can do MBA in any specializations of your interest.Some Good Colleges are: IIMs , XLRI

Goa Institute of Management

Lovely Professional University-Punjab

K.J. Somaiya Institute Mumbai

D.Y. Patil University

It really depends on your interests. If you carry on engineering or want to pursue career in business management, it's all fine. Mba will help your exploring more areas of market and companies really want managers with technical knowledge. There are many colleges offering MBA with very good placements. Just make your mind and go for it. All the best.