troubleshooting Question

Best Practice: LAN / Network Design (IP Addressing) for 350 User NEW BUILDING.

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I am working with a web marketing startup that is transitioning to a larger building and am tasked with designing the network from scratch.  I am more of a hardware guy and do NOT have a background in Network Administration so I am looking for advice on how to proceed with this portion of the project.

I'm looking for the best way to create a scaleable network, that's easily manageable and provides room for things like VoIP and local network services (print servers etc...)

We have now purchased a Layer 3 Blade Switch (modular, 288 ports)

Is this a good plan or best practices???

1.)  Divide office into small networks (subnets?) using VLANs.  This keeps broadcast noise manageable on each VLAN.

VLAN 1 (Servers, Printers etc..) :
VLAN 2 (Engineering Users):   
VLAN 3 (Sales/Marketing Users):
VLAN 4 (Management Users):  
VLAN 100 (Phones):                 
VLAN 200 (WiFi):                        -

2.)  Setup static routes on the switch to route between VLANS

What IP Scheme do I use?  Do I just stick with 192.168.x.x or do I go with 10.x.x.x ?  I know there are Class A, B and C ip ranges - but I don't really know what that means or when to use which...

Looking to be pointed in the right direction...  Experts-exchange-example.png

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