Depending on how much you care about running free software vs. professional support, there are some off-the-shelf routers which come with better firmware than DD-WRT, are fully supported by the manufacturer, and are in the same price range as the typical consumer routers you might put DD-WRT on. Look for devices marketed for small business/home office use.
I switched away from DD-WRT after my second reflashed consumer router overheated and fried itself. Mikrotik is my current choice, and some of my friends are using other brands quite happily. Ticks my boxes for low power consumption, high reliability and performance, timely security updates and support, and very flexible configuration.