New LAN Design Help

I'm new to Cisco and hoping to implement a large Cisco solution. Unfortunately we're not in the position to hire an expert so I'm seeking some much needed advice!
The general plan for phase 1 would be:
A router with 9 interface cards, that will have a 4Gbps trunk to an Internal Network Switch, 1gbps to DMZ switch, 1gbps to WLAN router, 1gbps to identical router for HSRP, 1gbps to WAN switch, and 100mbps to Internet router
The router will need to participate in OSPF, HSRP and do trunking. It needs to do IPSEC vpn tunnels
The Internal Network Switch would have about 40 Vlans to individual departments. Each department uplink to the Internal Network Switch would be 100mbps. Eventually this switch will be doubled up for redundancy.
There would be about 1000 clients going through it via the Internal Network Switch, and through the Router, using the DMZ servers as well as the Internet.
So I have a few questions regarding this setup:
1/ Which type of router should I use?
2/ Which type of switch should I use?
3/ Is the network schema at all correct or would there be a better way of doing it?
Hoping for some help!

1) I recommend going with Cisco 2800 ISR for the IPSec VPN http://www.cisco.com/en/US/products/ps5854/index.html
2) I recommend going with Cisco 3750G for the DMZ, WLAN, WAN switch connections. This switch provides (with the right image) HSRP, OSPF, EIGRP services.
http://www.cisco.com/en/US/products/hw/switches/ps5023/index.html
3) Drop all connections down to the 3750G (all ports support up to 1Gb speed) and perform all the routing there as well as layer2 VLANs.
Nice, clean and inexpensive solution.
In addition, 3750s support stackwise cabling so if you purchase more than one switch for port density, in the config it looks like a single switch.

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