Depends on the flavors you're interested in.
Super Lemon Haze and/or Lemon Skunk for intense lemons.
Sugar Punch from Sannie for sweet and dank all at once with incredible smoke.
C99 for pure fruit.
I've had good luck with God's Blue Cheese smell/taste wise from JOTI. Didn't find a plant worth keeping but I only grew two... smoke was nice though and flavor was really pretty special. Dank/cheesy.
Blueberry from PeakseedsBC.com also a great source for C99.