I've grown some plants that do give off a nice juicy smell as they are growing. I mean, you can still smell that it's weed, but there's a sweet overtone.
Unfortuantely I can't answer the rest of your question because that particular group of plants was from some seeds I produced crossing a couple beautiful plants that I grew from dank-ass bagseed... so yeah, the smell can be real nice in flower, but as for strains, you'll have to read up on the seedbank sites because they DO tell you if they have a nice smell when they're in bloom on some of them.