If you want BBQ, go to the US. Else for just a normal steak, just source good ANZ beef and pay for it. Cheaper Indian beef (mostly buffalo - you can get cow meat but that's mostly tougher) can also be mostly grass-fed but it's harder to source.
Australian wagyu is, for my money, the best beef in the world (yes, better than Japanese wagyu, which really is too richly marbled), but American Prime is no slouch either.
Australian wagyu is actually the worst offender in this regard, since it means that cattle spend 1-2 years in a factory farm feedlot.
Western cooking tends to prefer having rich fat marbling on the beef and let it cook in its own fats, but in Asia, we tend to prefer leaner cuts for our cooking, mostly because beef isn't usually eaten on its own as a steak.