i've used both linksys and dlink and setup various other ones in my work
Linksys are good, HOWEVER they have some issues. even tho they are owned by Cisco, who make the best routers for a business. their wireless n routers have some issues when starting up, if they lose connectivity it takes a long time to get it back, tho they could have fixed this issue.
i now have a Dlink and it works great. i've had no real problems with it and what problems i have had were fixed by a reboot or a reset.
the Dlink also has WAY better security settings than the Linksys. it has some great security features, tho it's a bit more strict than the Linksys it's better in the long run.