I like Antec cases myself. I got a P180 (one of the newer revisions with all the good cable management stuff) on a special last year for around $60 (normally around $150). It's an awesome case, but it is quite large for a mid-tower. They make a smaller version of the P180 but it is only for Micro-ATX boards. Generally their cases are good.
Realistically, you have an ATX board and just about any ATX case will work. It's largely going to be a function of what you want. Pick a size, color, and number of bays, then see what's listed. The higher quality cases normally don't come with a PSU (though they're usually more expensive too), but there are some exceptions (Antec does make some that have their value-line PSU installed).
One thing about the reviews on NewEgg, in some cases they are very useful (motherboard, CPU, memory, etc). In others they can be very subjective, especially when it comes to cases. A case purchase is not just a functional but an aesthetic decision, so a really fantastic case may get bad reviews because someone doesn't like the way that it looks.
Also, sometimes the reviews can be skewed when they consider the case individually rather than as a part of the whole. For example, how important is it to you to have a tool-free case? Most people say important. How important is it to you to have a spare parts box/compartment in that case? Probably not as important. A case may have a removable motherboard tray that makes installing the motherboard a breeze. Of course, if you only install the motherboard once and don't tend to change it out very often (and most people don't) then it's not such an important feature.
So I went to NewEgg and pulled up a list of all of their ATX mid-towers, then sorted it by the best ratings:
The first 100+ are all 5-star rated and range from $45 to $145, so there's something for everyone there.
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