modal verbs - What is the difference between "might be" and "would be"?

To me both might and would appear to have similar meaning. E.g. consider the following sentences:.

1. I think taking some rest after work would be good.


2. I think taking some rest after work might be good.

The only difference I see is that would sounds more assuring than might. That is, in #1 speaker is more inclined to accept the fact that having some rest will be good, but in #2 speaker isn't sure about it. In #2 it is like 50/50, it can be good and it cannot be.

So, what is the difference between would and might?