So Marz would probably be the over all winner and who id go through next. They're one of the cheapest if you go on their website and use the discount code (redditwave) floating around you can get a big 5.5 pound tank for only like a hundred bucks. Other brands don't even have that large of tanks and are more expensive. Plus it felt very clean and potent. Tasted like dentist gas. They were also the fastest and first to arrive in 2 days after ordering.

Honorable mentions/runners up:

Goo was very clean and potent. Felt identical to marz and was decently priced.

Magik Maxx was supposed to be "scientific grade" but it didn't any stronger than the others...it was good just nothing note worthy and pretty pricey. Plus there's drama with the owner or something on the nitrous sub 🤷

Full Hot Whip was strong too but it felt like it didn't last as long as it should have. But it womped very hard.

Some bad experiences:

Miami magic and Baking Bad both had a weird after taste and had visible oil.

Monster Gas and Prime both felt very weak and diluted. "Airy"

Horrible stay away from:

Absolutenitrogen: this shit burned my throat and made me cough and sent alarm bells off. Idk if this is even Nitrous Oxide or what. But stay away. I didn't finish the balloon and threw it all out

Anyone's I didn't mention weren't note worthy or didn't leave a impression (good or bad) So id probably buy them if nothing else available