Recommend me a home network topology

I have quite a number of network devices at home
- Sony PS2 (eth)
- Xbox 360 (eth)
- WII (wifi)
- old PC (wifi/eth)
- new PC (wifi/eth)
- 2 x laptops (wifi)
- internet radio (pure flow, wifi)
- 3 x phones (wifi)
- SPA 3102 voip gateway (2 th - in and out)
- thomson 585v7 adsl router (4 port, wifi, adsl)
- 2 x FON routers (wifi+eth one for outside access, one for inside)
- A NAS storage device (buffalo linkstation) with external USB
- 2 spare fon routers (all fon routers can run ddwrt or openwrt firmware) (unused)
- spare DG834Gt adsl modem running dgteam firmware (unused) 4 ports eth, 1 wifi
- a 4 port 100/10 hub
- an old Prestige zyxel adsl router (unused)
- A speedtouch 780WL adsl/4 port router (unused)

Currently all wired components are in the same room as the router, but this leaves me with slow performance to the main house PC. I need faster access via ethernet (start with 100, may go above later) rather than the 10-25 wifi can manage.

I want to achieve
* faster access via ethernet (start with 100, may go above later) to the NAS rather than the 10-25 wifi can manage.
* All PCs can access NAS
* Voip continues to function
* Ability to add asterisk on linkstation to service voip
* Xbox360 streaming from media center on new pc (it seems this means on same subnet)
* pure flow streaming from twonkymedia on linkstation (as above)
* No hole drilling (although an ethernet cable is best option)
* No purchase of extra kit (am broke)
* WPA2 security used
* PCs are powered off when not in use
* minimize other devices left on.

The key no doubt lies in the correct application of multiple subnets vs bridging using some of the semi-configurable routing kit available.

Thoughts
* I just move linkstation upstairs, and use wireless bridge running on ddwrt to connect back to base adsl router. Unfortunately a) ddwrt does WDS, but this doesn't work with WPA2 b) ddwrt does client bridge, but this doesn't work with multiple devices on ethernet side
* I just setup a regular routed network between adsl router location and desktop PC, but this introduces multiple subnets which will cause complications with upnp streaming to pureflow internet radio and/or xbox