New Gaming System

I am trying to upgrade two computers at the same time. One has very little that can be reused.

Now:
Celeron 1400 MHz
256 MHz pc133 AGP
ATI 9250
45 gig hard drive and a 25 gig hard drive
Sound Blaster Live
The mother board is some type of Intel motherboard
150 watt generic power supply

Upgrade:

The Albatron PX915P4C $89
Motherboard
Antec Power Supply (SP500) $74
Power Supply
Sapphire ATI Radeon X1600Pro 512MB PCI-Express Video Card, RETAIL $130
Video Card
Kingston 2x512 PC3200 (taken from the 2nd computer)
Processor: Pentium 4 4CPU 2.80GHz (taken from the 2nd computer)

This is for an 11 year old that just wants to play Oblivion. Is the new set up ok?

The X1600 isn't very powerful; I'd say go for a 7600GT.

Thanks for helping me with the first computer I changed the video card to the X850XT.

For the second computer I only have a video card:

SAPPHIRE 100154 Radeon X1800XT 256MB 256-bit GDDR3 VIVO PCI Express x16 Video Card

I am considering

Asus+Atlon 64 x2 4400
Motherboard Combo

Memory
Memory

I still need:

Power Suppy
DVD
Heat Sink

Thanks

For a PSU look at Antec's True Power line, they have good products. For the heatsink, some good brands to look into are Zalman, Scythe, Thermalright, and Arctic Cooling.
Also, on a side note. Instead of giving links, just paste the part name, Since you only have a couple links it's no problem but some people post lists of components with just links and it takes much more time to go through every single link than it does to just read off what the person could've copy and pasted into their post. It makes it easier on us. Just telling you for future reference.