In MA- there are many, HARVARD, MIT.

In virginia, I guess university of virginia would be good.

Architecture is always tough, you will have to skip food, sleep as you did in your bachelor. Plus here you have to maintain the deadline or be dead! You can not late submitt as you often do in Nepal. About job prospect, architecture is not well paying job and if you get job, you will get $30k +, but again if you deduct the tax and expenses, it comes around nepali Rs 20 k/per month. So is it worth coming here, think about it. If you want to just study and go back, for the architect who has good caliber that would be better choice. If you get stuck here, you will be lost! But once you come here, unless you have strong reason to go back you would probably want to stay some years...but it is upto you. What do you want!

I feel sorry to all those architects, unfortunately it is not well paying job unless you are big shot! applies everywhere.  So are you in Australia now??