What's the difference between それならいい and それならいいんですが


What is the difference between それならいい and それならいいんですが?

I'm guessing that the んですが implies some sort of unsaid reservation or concern.




んです is a colloquial saying of のです. A dictionary says のです indicates predication
which emphasizes a reason.

I think this が is used when you hover on saying something definitely. For
example, こっちの方が良いと思うが, あなたは悪くないと思うが.
<http://dictionary.goo.ne.jp/jn/34931/meaning/m0u/%E3%81%8C/>

So それならいいんですが indicate you hover on saying それならいいんです definitely.

