Hi, I have some network issues between 2 sites when it comes to VOIP calls. I suspect the problem is that there is no QoS throttling the traffic between the 2 sites. As soon as somebody start a big file download between sites, audio traffic is disrupted. The sites are currently connected via VPN tunnel over internet with Microsoft TMG/ISA where DiffServ is not supported. In a short term, I need to purchase a pair of routers that support Diffserv over site-to-site VPN. In a medium term, I need to sign up for an MPLS link instead of running VPN over internet. Between HP, Juniper and Cisco router, can anyone please give me suggestion for a pair of routers that will support QoS Diffserv for site-to-site VPN over internet and would also support MPLS protocol?