I normally dive with friends from work, one of them has a boat. My good buddy is one of the boat captains for Blue Dolphin charters. I just went out with him last tuesday to Lehua Rock, just north of Niihau. He has a tour that combines a trip of the Napali Coast for sight seeing, then cross the channel to Niihau for the Wall dive, known here as Vertical Awareness. See my dive report:
http://www.scubaboard.com/showthread.php?threadid=2692
Depends on what type of things you want to dive. There is a neat cavern/lava tube dive on the south shore called the Sheraton Caverns(located off the Sheraton Kauai) in about 60 feet of water. Lotta turtles and fish. I like the wall dive. You can go down to 120 and swim the wall. Lots of seals, sharks and rays sometimes.
Blue Dolphin Charters is my friends company and the boat is nice. It's a 63x25 foot cat, double decker, set up really nice for diving. They provide breakfast, lunch and a open bar for the trip home.They do a number of different dives and locations so youcan call them to check it out.
Their number is 808-742-6731
http://www.kauaiboats.com/
If you end up going with them, email me and let me know. I'll go along!
Oh yeah, I have not dove with bubbles below....
In Poipu, I would go with Seasport Divers 808-742-9303, they are right on Poipu Rd. close to all of the hotels in the Poipu area. Another Poipu location is Fathom Five Divers 808-742-6991, they are right up the road. Do the Sheraton Caverns if you dive the south shore, else do the Blue Dolphin dive over to Niihau or up the Napali Coast. The Blue Dolphin boat is really nice. Includes food, drinks and is a very comfortable boat.
How many are there of you? If I get 4 of you, I can get a deal from my buddy. With 4 people, he will do 2 for the regular price and then the second 2 for the price of one! So 4 of you could dive for the price of 3, all you have to do is let me know and i make the reservation at the discounted rate. Then when you get here, I will introduce you to the Captain. I will be off island 4-13 Sep. When are you coming? I don't have to be here to get you the deal set up, so Let me know if you need anymore numbers etc....
K_D