Hello,
We currently in the process of upgrading our WAN.  Moving away from point to point fiber, over to a Cox TLan/MetroE mesh setup.

I have never dealt with TLan's before, but the actual setup seems pretty straighforward, I need advice on the type of hardware recommened on our side.  

We will basically have a 500mbs pipe at our central location, the 15 remote sites will have varying speeds for 10mbs up to 100mbs.

The hand-off from Cox's Nortel equipment will be ethernet.

Stll trying to get exact info from Cox but so far they sent basic info on what they recommend for installing, if we lease from them it will be ~3,100.00/month which seems kind of high, so we will probably just purchase, or lease from a vendor.

Cox said:
(1) Cisco 7200-npe-g2 - for main site
(1) Cisco 3750 - for main site, I believe for VLans
(15) Cisco 2801 - for remote sites

We are also in need of new core switches for our network, were thinking of HP 5412's

Need advice of going with the routers or trying to kill 2 birds and using Layer 3 switches all around.

The network needs are fairly simple, we will need Qos for VOIP and of course routing between the mesh for possible hot/warm sites.  All servers are currently located at our central location, which will also be the route for all of the site's internet connections.

What you would recommend and why, especially if you have already gone down this path, just need help and advice to get it right the first go around :)

Thanks alot