Is there any reason why I couldn't get two separate one gig sticks of this ram (http://www.newegg.com/Product/Product.asp?Item=N82E16820145593) instead of having to get the two stick kit, as seen here: http://www.newegg.com/Product/Product.asp?Item=N82E16820231118
Is there any advantage to getting the two stick kit, over two individual sticks?
I would say you could get either. Those kits are sold as "Dual Channel kits", as far as i know its just two ram sticks that are garunteed to work in dual channel mode and sold as a pack. But if you buy seperate ram sticks, as long as there the same brand/series and same size/speed they should work fine.
Kits have usually been tested, and the ICs generally come from the same batch. Not necessarily the case with single sticks, but if you buy two single sticks at the same time, you'll basically wind up with what you'd get out of a DC kit. Sometimes it's cheaper, too.
It's not nearly as hard to mismatch RAM successfully as many people think. As noted, sticking with the same brand is often sufficient. Try to match speeds and timings (the latter moreso) if possible.