profile evaluation

Gre Score- 310 (Quant-160 Verbal-150 AWA-3.0)
Toefl- yet to appear
B.tech- 8.4 CGPA
12th- 83%
10th- 88%
Internships- 3 (2 technical- tata teleservices and centre for department of telematics, 1 management)
No published paper but written 4 term papers and 1 sem project

shortlist colleges-
iowa state
penns state
unc raleigh
clemson
ucolorado boulder
massachussets amherest
maryland college park
british columbia
waterloo
toronto/mcgill


I want to pursue masters in electrical and computer engineering specialization in network security. I would really appreciate if someone could guide me about the prospect of my choice of colleges and if you have some others in mind do let me know.

thanks