Rebuilding my home network

[caladin]

As this is my first post Im not sure if this is the correct forum. If it is i have a few questions relating to my rebuild.

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Background
Verizon Fios - Broadband connection
Router = Actiontech MI424WR
wired Pc's
1. Windows 7
2. Windows 7
3. windows 7
4. Ubuntu 9
5. WHS
6. Brothers MFC5890CN
7. Internet Camera

Wireless Devices
1. Xbox 360 Elite
2. Xbox 360 Arcade
3. PS3
4. Wii
5. Work laptop - Running g/n Nic

Wireless or Wired - Unsure as of yet
1. WD TV Live Network Ready HD MP


I am looking to turn of the wireless connetion on the actiontech and setup both a Linksy WRT54gs 1.1 w/ totmato for my G connection. I am also looking to purchase a Asus RT-N16 w/ ddr-wrt or tomato for my N connection. I would also like to get all my wired PCS and network camera on a 1g switch.

Questions
1. What problems do you see with this setup.


2. What 1g switch do you recommmend for this network. I looked at the D-link DGS-1016D and saw good reviews but 16ports seems like it might be overkill.


3. How do I go about setting up the 2 Wireless routers with the switch and actiontech?


4. Can anyone recommend Wireless USB N adapters I can use with the xbox, ps3 and WD TV HD MP.