Thank so much Arky Lady! That site was very helpful. Also, I am back down to a 37 or 29 gallon tank. The reason? Stands. Stands seem highly overpriced and as I want to set this thing up soonish I don't really have the time to build a nice one. So the plan now is to do the 29g, wait a while, build a good looking 55g, 75g, 90g stand and then pick up a 75 gallon aquarium. The stand I did buy for a 20 long, 29g, 37g is nice. It was a light oak (matches the living room furniture perfectly) and I ordered it from Petco for a reduced price and free shipping. Yeah, 35 pounds and free shippnig, can't beat that! I may still go with a 37, but it depends on how much my LFS marks them up... see posts prior to this about their mark up... over 100% higher than Big Al's online on some things. Ugh. I refuse to pay them that much.
I've another question (I know, when do I not). What sort of impact would 4-6 ghost shrimp have biologically on a tank? Do they produce a lot of ammonia? or are they sort of low bio-load-wise? They're fascinating creatures and in my youth my brother and I used to catch them in a pond near our house.
Oh, another question! Wal-Mart has some tank packages but they have Aqua-Tec HOB filters in them. I've found Tetra Tec filters on some sites... but I know nothing of Aqua-Tec and their reliability or lack thereof. Does anyone have any experience with this brand, or know anything about them? Thanks!