I'm wanted to chime in and even though im a noob on this board, i would like to voice an opinion as well, I am what you consider an independent "republican", meaning I research the candidates and make and unbiased choice, however, more often than not I tend to choose republican.
Now to say a few things, reversing tax cuts made by Bush would effect more people than just the highest tax bracket (over 250k). It wouldn't be a huge impact, but still an impact none the less.
As for the choices between McCain and Obama, I think both have very big weaknesses and some plusses. And will have to agree with ASUGRL, we're choosing between "a shit sandwich and a giant douche"