I've always liked Antec products, started with their PSU many years ago and then moved onto cases. I'm still using an Antec 900, the build quality and design is absolutely top-notch and for the price couldn't be beaten at the time.
I particularly like Antec for creating the venerable Performance One line of cases. They look classy and are excellent choices for those who value silence. And who can forget the legendary Antec High Current Pro series of power supplies? When you want a no nonsense and rock solid power supply, the HCP is among the top choices for builders around the world.
One of the very first computers that I built myself was built in a venerable Antec 1030B SOHO full tower case that included a Antec 300 watt power supply. It was built with the then new Socket A AMD system. That machine never gave me any problems and the Antec case seen many, many different builds using the original 300 watt power supply.
That, I feel, is a tribute to the quality and workmanship that is associated with the Antec brand of enclosures and power supplies.
To this day I still use many of Antec's cases and power supplies for myself and my customers systems as the quality is top notch and the price is very competitive.
Very high quality gear on the enthusiast end, but even their "value" (earthwatts, neo) lines and entry level products have exceptional build quality. The Antec 300 case I recently did a build in felt much superior to its cost.
I've been using an Antec 900 case for over 4 years now. Airflow is great and my case temps rock. I am looking to build a new box and I will definitely be looking at a larger, Antec "x"-hundred case to begin my build!