Hello there and a warm welcome to Aquaria Central....
A little bit of advice, you should be looking to be having your new tank running for about a good 10 months to a year before introducing a nem...just my opinion of course...they require prestine water and very good lighting..I would suggest, when you do get one, that you go for Metal Halide lighting...It is more expensive than comparable T5 lighting, but, i think its far better...
Can you give us a little bit more info on the tank your buying and the other equipment you have in mind? are you looking at keeping corals?
Ask as many questions as you like here mate, we are all here to help i any way that we can...
Niko