I have an Antec 300. The options for cable management are practically none, the case is very small compared to the latest computer cases which are now bigger; the 300 has no cutout holes to run cables through so that makes it more difficult.
There is a small little cut-out to hide your cables behind the hard drive cage. If you have a non-modular PSU, you can push all your cables through that side and keep them concealed and zip tie the the cables that you are not using to the HDD cage. That is all I can think of for decent cable management, its really not that much.
If airflow/cable management is a concern, I suggest buying a more up-to-date case like a Cooler Master. IMHO, Antec cases are very outdated, and are hardly revised or updated.