I think the Fluval Spec V is what I'm going to go for. I'm not really sure about the heater. I live in North Texas, and we keep the heat in the house at about 74-75 during the winter, and the A/C at about 74 in the summer - temperature inside the house is fairly steady. It's going in the same room as the fireplace, though, which has no glass doors and can sometimes get a little drafty, so I'll probably add a heater just to be sure.
I'll post some pictures once the tank and everything arrives and I start scaping.
Thanks for all the suggestions!