I don't flame fellow FReepers. Anyway, my feeling is this, you vote for the most conservative person in the primary and then the Republican in the general. Even if he/she is RINOish, it's an R and that means it counts toward the total R's and keeps the Republican majority. I'm not happy with Bush and I'm not happy with the Senate but I would be a lot less happy with a Gore, Kerry, Clinton at the helm. I would be a lot less happy if Kerry had picked the last two Supreme Court Justices with the approval of a Dem Senate. President Bush and some Republicans are not ideal, and it's certainly not pretty and painless, but that's the way politics work. I won't sit out an election and I won't vote for a Dem or 3rd Party.
I think your strategy is the most effective one. In the longrun I expect we will head towards the government regulating so much and so bureaucratic that the system will eventually come down like the Soviet system did for the same reasons.
But the Republicans do delay that end run.. they can't stop it because if they don't make things more socialist and more nanny statist the people vote them out. So they do things like the perscription drug plan.. just a lot smaller then the Democrat plan.
Ultimatley I think people have to look beyond voting as the way to make society the way they want it to be. And I'm not saying going for dictatorship, but that voluntary action is more powerful.. I think what happens when people view voting as the only way to deal with any issue, they empower the politicians.. they make the politicians the only source of power in the nation.