I can comment on RPI. I am biased since I am a graduate of RPI an my DS visited last year as an excepted student. First RPI offers a room and board scholarship to all scholarship ROTC students, so all your school cost will be covered. The NROTC unit seemed to be very well run with nice facilities. The just upgraded their computer space that I think is used for navigation. The MIDNs we spoke to were excellent. But, that is typical of all MIDN at all units.
Academics at RPI are rigorous, and as you would expect tech/stem oriented. The entire student body has that tech feel. The engineering labs and facilities are top notch. If you want a "technical" institute for your college experience there are very few schools that are better academically.