When it comes to a pellet diet, between Hikari and NLS I'd have to pick NLS. I've fed my cichlids & catfish several of the Hikari pellet formulas and I'm not as happy with it. It's cheaper and fills up the fish fast but IMO I don't think it's as good as NLS. I notice that my fish have lost some of that even overall mass and gained a fat pot-belly look, especially the catfish. I don't like it. It wasn't hard to switch most of the fish over either but I'm planning on switching them back to NLS. For the extra bucks it's worth having better/healthier looking fish and peace of mind of feeding them top quality food.
As for the frozen foods, I use Hikari bloodworms and brine shrimp. Love the frozen BW. I also use Hikari's freeze-dried BW and love it.