Since i'm in the computer industry, i would say D-link routers work quite well. So is linksys. But the old linksys router, where you need to use the CD to setup the dialler is such a mess to set up. I'm using DI524 with 600T modem. Last time i used a 604T and i sold it off. I think the guy is still using it. Zyxel modems are ok too. I never tried their routers. But i have installed a few Prestige 600 series without much problems.
Try to stay away from some of the lesser brands, is all i can say. There are just too many bad things to stumble into.