I thought you decided!
OK. Since you didn't, let me put in my two cents.
Steelheart.
I'll tell you why.
The Busses have lots of great qualities but in my view those qualities are best seen in the larger knives. That's where infi's toughness, the asymetrical edge, the chopping ability, the edge retention, the solid feel etc really stand out. The NO is a great knife, but the SH I think is just that much more outstanding as a bigger knife. And there's not that much you could do with an NO that you can't do with a SH II.
The steelheart is a big knife - an outdoor knife. If you will be chopping, trimming branches, clearing brush etc, that's the one.
But the NO is also fantastic.
Whichever you pick, you will make the right decision.