I can recommend Draytek. I've had my router now for approximately 4 years and haven't had a single problem. I get a excellent wireless signal anywhere in the house (older built brick walls etc) as well as the garden. I've not used it to connect to DS and Wii so can't comment there sorry.
The router is easy to setup with the setup wizard and has excellent levels of security.
They are quite expensive though and it may do a lot more than you want it to but they are very good quality....click here for a newer version of the one I use.
I've setup numerous routers for people including Netgear, Linksys, D-Link and they were all relatively easy to set up and I haven't been called back to any problems with them.
I hope this helps.