You make a good point, yet it may be worth the "price" of accepting some leftist-type social legislation in order to save the Constitution and preserve our republic. I think this is literally what is at stake here.
As Dennis Prager has noted, liberalism/democratic socialism is intoxicating ... and with four more years of building increasing dependency on government and undermining the Constitution, it may be impossible to turn it around.
Ironically, that is more likely to happen with Romney in office working with RINOS and Democrats. Romney won't repeal Obamacare, for example, he'll make it his own.
At least if Obama is in office, Republicans will gain seats in congress and be able to stop any further damage. In fact, the best chance of eliminating Obamacare is enough conservatives in Congress with the courage to defund it.