Looking for a router to connect to a 5/50 cable modem that works with Sip. A Crisco RVS4000 installed now has real problems with Sip, one-way audio and throughput not up to the WAN speed. No VPN needed, something affordable, $200-$350 US range. Every thing I looked at in that range had some reported problem except pfSense in a ATX box. Any recommendations or comments appreciated. thanks Steve Casto