Nobody seems to be in a rush to champion their Router, so I will give you my views.I'm with NTL and have had Broadband for over a year. With two young daughters, have networked the house, three machines with option for another lap-top. When i started to look into which router, a good friend first ask some questions, i.e. dedicated print server ? wireless ? cost? ease of set up!
I required the print server , but not the wireless, so I settled for a SMC Barricade 7004abr. But this one is way above your price requirment. I would find a forum dedicated to networking, which concentrates on there/your isp provider, and find what they recommend. Networking does not always work straight from the box.