The only fish I have so far are 3 Tiger Barbs and 3 Green Barbs as I am waiting for my tank to fully cycle before adding any more fish. (Very close!) I absolutely love Barbs! Super active and very entertaining to watch. All 6 school together. I highly recommend these types! My next 2 fish will probably be Barbs!
Kissfn,
Still hasn't happened yet, eh? Sorry to hear that. In my fishless cycle I have passed phase two, and am squarely in phase three. The NH3 and NO2 dropped to zero in 12 hours with a 3ppm dose, but haven't done it yet with a 4ppm dose. It is close, but not quite... Last night it took 14.5 hours. Tonight I couldn't test until 13 hours later, and it didn't quite get it done. NH3: 0.25ppm, NO2 <0.25ppm.
I like the tiger barbs as well, but I've heard they are too aggressive for my other stocking choices... But then again, my tank will only be 30" long not 72"! All that extra room might keep even the most aggressive fish very placid, since there will be so much room for them to roam.
BTW, I know you are worried about overstocking, but that tank should hold 180 inches of fish very easily. You haven't even scratched the surface of that with what you have mentioned, so far as I can tell.