Asking for advice on a network design

Hello, I have a networking situation I am looking for advise on how to resolve. I currently wish to setup a gigabyte network for my PC's at home and I am looking for a bit of advice regarding how to achieve my goals.

I have 3 PC's which have gigabit network cards already in place. I would like a hardware firewall in place for the entire network, with the ability to set at least 2-3 IP's out on a DMZ. Also jumbo frames support is needed as well.

Two of the PC's need unique IP's but I intend to use NAT on all three as added protection(this may require multiple routers).

I also have 2 other devices which only support 10/100 networks will also require unique IP's and DMZ, and 4 standard 10/100 devices one of which is wireless that can be on any NAT.

I have 4 unique IP's to work with from my ISP, and a Cable modem which provides them. The network will span a total distance of less then 30 feet in length.

Preferably, I am looking for something with A hardware firewall which includes: A stateful packet inspection(SPI), DoS attack protection, and a configurable interface on each device.

I would prefer to keep the entire setup under $250 if possible. Any advise on what I should purchase and how you would configure such a setup?

 

ZyWALL 2 WG router