Motherboard for a Dimension 3000

[Zmaz]

Hey, I'm a moderately experienced PC user, and I'm looking to upgrade my mobo. Once I got my Dell Dimension 3000, I looked to upgrade the video card, but lo and behold, no PCI-E slot! Not even an AGP slot, so here I am, trying to get a new motherboard.

Here's what I need:

A mobo that will fit my Pentium 4 3.0 Ghz processor (478-pin)
One that supports 184-pin PC3200 DIMM DDR RAM
One with a PCI-e x16 slot, and some PCI Slots
One that will fit in my Dimension 3000 Case (Intel Micro ATX I believe, but there's some debate over the true sizes: If it won't fit, please say a good place to get a case that will work with it).

Here's one I've been looking at: http://www.motherboards.org/mobot/motherboards_d/ASUS/P4GPL-X/

Also, please say what power supply I should be looking to get for the motherboard you recommend, plus a P4 Processor and a PCI-E video card
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Or, I've also been thinking about starting over somewhat. I'd like to be able to salvage my proccessor and my RAM, but otherwise, how much would a PCI-E motherboard, a good power supply (350W+), a PCI-E video card that would be good for games like Sims 2, Madden 2006, and Battlefield 2 etc., and finally a case that would hold all of that cost?

By the way, I use my computer mostly for gaming

 

[vnf4ultra]

The asus p4gpl-x is about the best you can get for a micro atx socket 478 board. The problem is finding one for sale, I couldn't locate any for sale in the us, maybe you'll have better luck finding one.
Any matx board will fit in the dell 3000 case. The front panel connectors won't line up properly, but you can modify the connector so that it will work with the help of the board's manual and a little wire tracing. The front usb/audio may not be compatible with a replacment board as well. I'd suggest getting a 350-400w psu. Here're two good yet cheap psus.
http://www.newegg.com/Product/Product.asp?Item=N82E16817104901
http://www.newegg.com/Product/Product.asp?Item=N82E16817104953


I'm not sure what budget you have, but good bang for the buck cards would be the 6600gt, 6800gs, and 7600gt. If you can afford it, then go for the 7600gt.