Question : Problem: Cisco 861W vs Cisco 5505 - Security and Perfomance

I need advice on how to setup home/office network and help choosing a good and appropriate cisco firewall.  This is home office and we have a non static IP address for our cable service.  Our mission critical servers are colo'ed at a good facility in Dallas.

Here is our current home office setup:
1) Televantage Phone server - Dell PowerEdge SC 430, Win XP 32 bit
2) Dev & customer service, endpoint 11 server - win 2003 32 bit (horrible cpu usage from endpoint, will move to SBS server as soon as possible)
3) 3 - Dell T3400 station w/ gigabit cards - win XP 32 bit
4) 1 Laptops Dell latitudes with wireless 802g
5) Other - PS3 and Xbox 360 - wireless 802a or b?

New not set up yet:
6) Exchange, VSS, Endpoint, File server - SBS 2003 - Dell PowerEdge 840
7) PowerConnect 2708 Web-managed Switch, 8 Port GE


Here is what I would like to achieve:
1.  Gigabit connection through switch from each client to SBS 2003 on wired.  
2.  Wireless access
3.  Good firewall to protect LAN.


Please look at the diagrams for proposed network schemas:
Diagram 1 - Cisco 861W
Diagram 2 - Cisco 5505


Questions:
1.  Are these schemas accurate and will they work as proposed?  If not please suggest.  
For example:
5505 is a dedicated firewall where as 861W is a router correct?  
Can I get gigabit connection from servers to clients through switch even though 5505 and 861W only achieve 10/100?  Not sure if I need a Gigabit router in configuration to achieve this.

2.  Are these Cisco Firewalls good and will they offer what I need to protect the network.  I have read Cisco IOS with SPI is the way to go.  Which firewall is better?

3.  Can both of these cisco devices handle VOIP.  Currently we use analog phones but would like to switch to VOIP in the near future.

Any help is appreciated!

Answer : Problem: Cisco 861W vs Cisco 5505 - Security and Perfomance

I guess you mean vpn peers license, you will only need 10 (standard mostly).
note: can always change this in the future anyway if the sites get much larger.