Re: A good wireless router
DDWRT is a custom firmware derived from an open-source Linksys.
It has evolved over the years as a full featured firmware (it's based on Linux) with professional-type features usually found in $300+ routers (like prioritization, wireless networks, routing...). It also let you control lots of parameters hidden in retail routers (transmission power, running software...).
So, if you have a bit of knowledge or are ready to spend the time to learn (they have a great forum), it can be very powerful. As it is free, it's a nice upgrade if available on your hardware.
As the universe is curved, there cannot be a straight answer...