To help you further filter the case selection (aside from the black or darker color and 120$ budget), can you provide info on the following:
1) Motherboard Size (ATX, mATX, or ITX?) - Please provide brand and model #
This determines the general size of your case. ITX mobos can fit in ITX, mATX and ATX cases. mATX mobos can fit in mATX and ATX cases. ATX mobos can only fit in ATX cases. Special (larger) mobos such as EATX need specific ATX cases that must support the specific size of such EATX mobo. The PCIe slot layout also plays into consideration (against the case's number of expasion slots) if you are using a multi-GPU setup.
2) CPU Cooler Type (Air Cooler or Liquid Cooling?) - Please provide brand and model #
In the case of air cooler, you need to determine if the height of the cooler would fit the width of the case. In the case of liquid cooling, you need to determine the size of the radiator/fans if there are enough radiator/fan mount location inside your case.
3) GPU (Length and Quantity) - Please provide brand and model #
The length of the GPU plays a crucial factor in determining case depth. Some longer GPUs may fit in smaller cases but sacrifices some HDD cages in the front. If you are into multi-GPU setups, the case's number of expansion slots must also be compared with your motherboard's PCIe slot layout, if all your GPUs would be able to fit inside.
4) PSU (Form Factor and Cable Modularity) - Please provide brand and model #
In some cases, PSU length has some limitations (but rarely a critical factor). If you are using an ATX PSU, most cases are compatible. If you are using a SFF (small form factor) PSU, you need a case that supports such PSU mounting (or use a SFF-to-ATX adapter bracket, if you can find one). If aesthetics is a concern, especially if your PSU in non-modular, you may want to get a case that has a PSU shroud or a case that has dual-chamber layout (where the PSU and its cables are well hidden).
5) Number of Storage Drives - Please provide current number of drives and possible additional drives in the future
You need to determine how many 3.5" and 2.5" drives you need to install inside your case, as well as, seldomly, if you need a 5.25" optical disk drive in your PC.
6) Window or Non-Window Panel - Please tell us your preference
Some like to show-off or have visual access to the innards of your PC without taking the panel off. Some don't like window panels and prefer a solid panel (or even a side panel with an additional case fan mounting location). Window panels can be acrylic or tempered glass. Some side panels are swing/swivel type, some have easy-release latches, most are not. Please tell us what you prefer.
7) Minimalist or "Gamer-Style" Design - Please tell us your preference
Some prefer simple box type with clean looks, some prefer alien spaceship type design with exaggerated looks.
8) Sound "Proof" (Minimal Noise) or High Airflow - Please tell us your preference
Some cases are designed with noise dampeners and lesser open vents to minimize noise levels at the expense of lesser airflow. Some cases are designed with numerous cross-ventilation and openings to maximize air flow at the expense of noise (and dust, if not provided with sufficient filters).
9) Specific Case Dimensions (Cube case? Mini-Tower? Full-Tower?) - Please tell us your preference
Depends on where you will put the case (on your desk? on the floor beneath your desk? on a shelf? etc.). Some cases, like most cube cases, have its motherboard tray laying flat, which allows for a case dimension with a shorter height (but larger width). Most cases are tower-type, which is higher but narrower. Cases also differ in depth, so, check the location if the case depth will be sufficient or not.
10) Weight and Material - Please tell us your preference
Some cases use plastic and steel. Some cases use aluminum. Some want a heavier case for stability (esp. with the PSU bottom-mounted). Some prefer a lighter case that can easily be transported in case of frequent moving (or LAN parties).
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