Nなら, -
文法の解説は英語です。
用法
Nなら, -can also be used when giving information to someone about something they have just said
例文
温泉に行きたんですが、どこがいいですか -> 温泉なら、白馬がいいです
I would like to go to a hot spring, where would be good? If it's a hot spring you are after, Hakuba is good