Interesting points. Though I can see where you're coming from, and in previous election cycles I've thought similarly, this time around I tend to disagree.
My view is that Ron Paul is not nor has ever been concerned with how he is 'seen' as you put it. He makes his decisions based on principle and I think he encourages others to do the same. He uses his vote not as a bargaining chip, but as an active representation of the oath he took and zealously seeks to uphold.
Different from your analysis, I think McCain & Obama are two sides of the same coin. Both will increase the size, scope, and power of the federal government over us, both will do nothing fundamental about our monetary system, our foreign policy, or our eroding individual liberties, not to mention any desire to uphold their oath to the constitution. Any differences in them are either rhetorical or only chipping around the edges at best. If I have learned nothing else this election season, this is it, and it's fundamental.
Unlike yourself, I do think Ron Paul would dispute a battlegrounder the logic that voting for McCain or Obama is the right decision this year. I think that's exactly why he held his press conference at the NPC with third party candidates from across the political spectrum. I think he sees people's vote as their bond of their principles, based on the way he uses it himself. I don't think he sees voting as a way to enable quid pro quo behavior or drive a strategy. However, he would be willing to allow you your opinion and vote the way you see fit.
I also do not agree with your analysis that voting McCain will somehow gain us enhanced leverage within the Republican party going forward. I think, just as it is with Ron Paul, that standing firmly on principle is what will gain us the most respect over time. Voting McCain says we're not the principled people we say we are - we lose any credibility whatsoever. Also, working within the party after this election, no matter who wins, will be easy. The party needs our idealism, our vigor, our constancy, and our participation, and they're going to be more receptive to our ideas than ever, given the current events of late.
All that said, you're free to do and think what you please and your participation is welcome on the forum. Yeah there are some blowhards on here, but the amount of knowledge to be gained far outweighs the bickering and barbs thrown.