Dyngoe,
My advice is to stay away from the powder blue tangs, go for a purple or yellow tang instead. Powder blues tend to attract ich. I've had at least 4 die on me in the past 18 months. I almost gave up, and got one recently because i just love them too much, and placed it in my 20G tank just to see how it does, and it did not take too long before ich appeared! So my advice is stay away!
PS. I got that old Neptune AC from you which never did work
but now I have a really nice AC3 Pro with EVERYthing under the sun. Including a really nice iPhone AquaNotes app which allows me to monitor and control the tank
Pretty sweet!
I recommend: Cardinals, six line wrasse, some gobies, firefish and a royal gramma. As for tangs:
I have a yellow (big boss) blonde nasso, blue (which I kicked out into the 20G for eating my Zoas) Flag Fin and I recommend getting a Flame Angel (not a coral beauty).
PS. I've kept as many as 20 fish in a 150G happy in peace.
a Percula Clown, a Pink Clown, 5 Tangs: Powder Blue, Blue, Blonde Naso, Flag Fin, Yellow, 2 Angels: Flame, Coral Beauty, 4 Cardinals, 2 purple firefish, 4 gobies, Royal Gramma, 6-line Wrasse.
PS. do not get 2 perculas unless they are a couple/mated. They will fight until one of them is dead!
As for a place to buy them... My recommendation: http://www.liveaquaria.com (best prices and great weekly sales) and if you want local: Aquarium Showroom in SJ.