I have never used routers given by isp. I have always used Draytek vigor routers. They are super reliable and excellent connection stability. Mind you they are probably too pricey for most. My current one cost me £230. Last one I bought for £130 had it nearly 5 years and sold it for £80. If you are how ether looking for budget price. Go for netgear, linksys or Cisco makes.