Generally speaking, that's a reasonable position. The twist is that the US system is designed for consultation and compromise. So the Republicans want one thing, the Dems the other and they're suppose to split the difference.
What the Republicans have discovered is that compromises tend to make the President look good. So they've stopped compromising. Mitch McConnell has been pretty explicit about this: he will only sign off on a Dem proposal if it's something, "...I and my members would do anyway..." http://voices.washingtonpost.com/ezra-klein/2011/01/mitch_mcconnell_the_most_hones.html Most Democratic systems work this way: members of the majority coalition support each other and the minority lodges objections. Therein lies accountability: if you don't like the coalition, throw them out.
The problem in the US is that the minority party can sabotage and obstruct and reap electoral benefits when the other side fails to get anything done. Indeed, economic sabotage becomes a viable strategy, which explains Republican resistance to stimulus packages and textbook economics: what's in it for them?
At any rate, if you truly believe what you say, you should vote for Romney, a Democratic House and a Republican Senate. That is, throw the bums out in the legislature *and* the executive. Frankly, I find this nuts: I only support pro-Science parties which for the past 10+ years excludes the GOP. Too bad our winner-take-all voting system blocks the emergence of more choices: a European style conservative party would earn my consideration.