I would suggest the Epox 8K5A2+. You can find plenty of information about it
here.
Also, if you are getting PC2700, I would save yourself some money and get one of the $55 1600+'s from Newegg. You will be able to run it @ 166mhz FSB (333mhz DDR) and a speed of 1.75ghz (2100+) easily. The money you save can be put towards getting some extra memory or something.
With the setup I mentioned above, you will be running faster than a stock 2100+ running a 133mhz (266mhz FSB) with no extra effort.