Well it's good you decided on a normal case. A few things I'll suggest while looking around.
Doors that open in the front are nice, but a pain when you have to open them every time to swap a CD. ALso they are sometimes mounted with cheap plastic posts and they often break off leaving you with an ugly case.
Also consider buying a fan filter for every intake fan you have. They few dollars you spend on the filter will eliminate all dust in the computer. They are wonderful. The aluminum ones are better, although the black foam ones are still great.
The cheaper cases that put drive rails and stuff so you don't need to screw the drives in are built cheap. The rails can break, the drive cages don't fit in nice. For cheaper cases, I prefer just screwing the drives in. No cages seem to slide in anf fit as well as an Antec or LianLii quality case.
Consider the newer designs with the power supply on the bottom. I love it for heat management and cable management.
Also get a power supply that is modular with removable cables. Use only the cables you need. You won't have a pile of cables left over that you need to bunch up and tie wrap in a mess. If your case comes with an el cheapo OEM PSU consider buying a second one and keep the OEM one as a spare...you computer will thank you
Another option is to just buy a nice regular case. Like a chenbro or acer full tower. Then you can paint it up and cut out your own window. You can buy window kits, or get some plexi from a glass place and install it yourself. YOu can by the window mouldings and pieces you need for making custom windows form online computer places. Air brush kits can be had for cheap as well if you really want to go all out. Or you can order a vinyl case wrap. Many options here for making a cheap case beautiful.
Hope I covered some of the ins and outs or case shopping. Oh yeah try to avoid 92mm fans. They are non standard and harder to find. 80mm and 120mm are the way to go. Thermaltake tends to like 92mm for some reason. I hate thermaltake for this. They wait for everyone else to come out with a mod...then they make their stuff better than the rest and go way over the top making their stuff look like it came form the circus. They try way to hard.
Well good luck to you.