Thanks bros for the replies.
onizuka: Nice tank you have there =) i did consider getting a tang too, but they will grow till quite a huge size, so i am not too sure will it be overload, as the porc puffer will grow till quite a huge size as well. or is there any small species of fishes to suggest so as to make the tank less empty? i am tempted to add a dogface puffer, but i guess it will be too much.
Terryz_: I read that those fish i mentioned are mostly not coral safe, so i think butterfly should be alright? I think the porc puffer might fin nip as well. Do you think is it possible to add some zoas or mushroom in there? i do not plan to add any chiller to this set up.
my budget for skimmer is probably about 300, but im going to look for 2nd hand items. is it too little to get a good skimmer?
Thank you =)