Like others said, you're going to find good and bad oils from all the suppliers and it depends on your preference. I don't care for birthday cake from Aztec or Lone Star so I wouldn't tell anyone to try their birthday cake even though a lot of people love it. I love the one from Fragrance Buddy or Rustic Escentuals or Peak (now sold at Keystone). It really depends on what you're looking for and your own personal preference in a scent.
I would check out Fragrance Buddy, Aztec, Lone Star, Flaming, Candle Science and many more. They all have oils that are great and unique to them.