If you are on a tight budget, and your 256mb of RAM memory is in two 128mb modules, get the ECS K7S5A.
If you can afford it, buy two 256mb DDR RAM modules.
An AMD XP cpu of anywhere from 1600+ to 2000+ is a great bargain. You will need a new case.
And you will need to install several cooling fans in the case to keep the AMD processor, which run a little hotter than the Intel processors, cool enough to run efficiently and with stability.
Preferrably, get an aftermarket heat sink and fan that cool more effectively than the original factory heat sink and fan.
Go to Google.com and do a search on such topics as "best AMD XP motherboard," or whatever other subject you wish to research.
Get your components from Newegg.com. They have the best selection, the best prices, and the best customer service around. Read the reviews down at the bottom of each item's detailed description get as many opinions on your prospective hardware as you can.
Although Newegg has great prices, after you total up what you need, you might be as well off to simply buy a new system. Then sell your old one as a unit, or piece by piece on ebay, or locally, or use it as a second computer.
I did that, bundled with an Athlon XP 1900. Unfortunately, I've been told that it won't handle the FSB at 133 mhz unless I upgrade to ddr ram, which I suppose is a good investment. Otherwise - the board is fantastic for the price.