Hi, yes it is a good time to visit both the countries. I have attached with this comment few packages for you, you can click on them to find more details about them. If you want to talk to someone about the packages simply fill in your details in the form and you will receive a call.
Suitable time to visit Nepal is in between October to December. I have been to Nepal in the month of May. April, may, first week of june is also okay. But I don't feel monsoon is the best time to visit Nepal. It is little risky. Best places to visit Nepal- Pokhara, kathmandu, Manokamna, Pokhara sarangkot.