hahahahahhahahahah
how about take the tank as it is and build on it from there, nothing better than buying someones hard work to set up a good foundation. saves you the time and money to do it.
Sw fish are very fun to watch and definitely you want agressive trust me sw can be more of a pistol than fw, time will show you!!!
edit:though with the cost of sw fish you might want to keep that from happening as they tend to be expensive feeders.