Naso tang, rabbitfish or sea hare?

[fishytime]

I am having a dilemma(to me anyway).I currently have mad crazy amounts of dictyota algae and brown wafer algae in the display. I take full responsibility for the problem as in an attempt to keep everything well fed I have created a nutrient rich environment. Also my dkh has been low(6) and I have slowly got it back up to where it needs to be. Snappy was over yesterday and IDed(thanks again Greg) the algae and informed me that a naso would probably gobble its way through the dictyota and wafer algae. So this got me reading and I also found that rabbitfish will also eat these types of algae. My tank already has two tangs(yellow and regal) and most will say (and I will agree) that I am overstocked as it is. I am afraid of adding another large poop machine to the mix, not just because of the added bio-load, but I would be nervous of the reception that a new tang would receive. My tank is also not really big enough for a naso (long term), although there are some 3" net caught blonde nasos at the store right now. Also at store are some wee small 2" doliatus rabbitfish(we think).... problem with them is, also a large poop machine and are known to munch zoas....and that simply will not do. Ok....then theres a sea hare... probably not quite the bio-load as a naso or rabbitfish, but butt ugly (to me) and has the potential to nuke the tank.

What would you all do?