I wish to connect two computers and understand it can be done simply with a couple of 10/100 Network PCI cards and a crossover cable. I'm confused by the price range of cards ($7 - $25) and wonder if I should purchase a particular brand or chipset... or does the $7 card work just as well as the card costing three times as much? Anything to beware of... or to be sure to get? Thanks for your recommendations.