conditionals: "...といったら、...." vs. "...というなら、..."?


> (1)「元気そうだと田中さんが **いったら** 、信用できる証拠と思う。」
>
> (2) 「元気そうだと田中さんが **いうなら** 、信用できる証拠と思う。」

Are both grammatically correct?

Were I to want to say:

> If Tanaka-san were to say that **X** appears to be in good health, then I
> think that that is evidence that you can trust to be true.

Are both #1 and #2 correct with regard to meaning?  
Which sounds natural?




For example...

> 1) 田中さんがそう言っ **たら** 、信用するよ。  
>  2) 田中さんがそう言う **なら** 、信用するよ。

＃1 means "If Tanaka-san says/said so, I will/would trust that." (Tanaka-san
may or may not say so). ＃2 can mean the same, but it sounds more like "Since
Tanaka-san says so, I trust that." (Tanaka-san actually said that.)




For example...

> 1) 田中さんがそう言っ **たら** 、信用するよ。  
>  2) 田中さんがそう言う **なら** 、信用するよ。

＃1 means "If Tanaka-san says/said so, I will/would trust that." (Tanaka-san
may or may not say so). ＃2 can mean the same, but it sounds more like "Since
Tanaka-san says so, I trust that." (Tanaka-san actually said that.)

