It depends on what you want. The NPort from DeKang isn't bad. If you want an American made juice like that try Goodejuice house Blend menthol Tobacco. It's nice.
I've enjoyed juice from:
Mt Baker Vapor
Alice in Vapeland
Goodejuice
Kick Bass Vapor
Tasty Vapor
I've put myself on restriction, until I actually try all the juice I have in my closet now.
My all day vapes are Mango or blackberry from Mount Baker. Some times I throw in some menthol liquid in there for variety.
It depends on whether you want tobacco-ish, fruity or other flavors in your juice. When I first started vaping I went to a local store and vaped myself dizzy on their tasting bar. I tried at least 30 flavors and couldn't find any I liked.
My taste buds have adapted now and I enjoy a variety of flavors now.
Whatever you do, order sample packs at first. Even though it is cheaper to buy a big bottle.... It's too easy to get sucked in to a nice juice description that you won't end up enjoying.
For Fruit Flavors, I prefer
http://www.mtbakervapor.com/ right now. This juice is true to form and priced well. If you find something you really like, you can get a huge (50ml) bottle for $11.
If you want to try something different, you may consider the sample pack from Heather's Heavenly Vapes:
http://www.heathersheavenlyvapes.com/store3/index.php?main_page=product_info&cPath=4&products_id=48
This store has a good reputation for good flavors. 10$ is a good deal to try 4 different flavors before you go all-in.
Another store with a big sampler pack is The Vapor room.
http://www.thevaporroom.net/3mltasters.html
You can get 10 3ml taster sized bottles for $25.
Good luck finding the right juices. If you like watching videos, I do like reviews done by PBusardo. He's reviewed a lot of equipment and juices:
http://www.youtube.com/user/pbusardo
Typed on my mobile. Please excuse typos.