i would say, if you have descent acad, descent scores in Toefl, sat, and will get admission in good school with very good financial aid, definitely come to usa. The key here is finance. If you can not get aid, then i would suggest you to do undergrad in Nepal and come here as a grad student. bibas has mentioned namesof very good schools. you can go to usnews.com and search good school with ranking. generally good school will provide better finacial packages, however getting into such school is not very easy thing to do. good luck.