Your Tall Tank
I have a 45 G Tall, essentially the same as your new one. Mine has a small iron stand that came with it, so the tank is still fairly short and easy to service.
The lighting can be a little tricky unless you stay with low light plants. In that case, all you need is a single, 6500 K, 32 watt, T12. If you want to have some stronger light plants then they'll have to be the kind that will grow floated like Bananas or Water sprite. I have the Banana attached to some driftwood and the Water sprite can be arranged around the driftwood.
The 45 G Tall is a very nice tank.
"Fear not my child, just change the tank water."