I bought a new laptop yesterday a MacBook! I hate to give Mr. Jobs any more money—but from what I can learn, none of the other makers are conservatives/Republicans, either. I absolutely love all my Macs!
Buying what, in your judgment, is the best product, regardless of the personal preferences of its maker, is sort of what the free market is all about.
Michael Dell is a Republican. You can check out his contributions here - http://www.newsmeat.com/billionaire_political_donations/Michael_Dell.php. While he has given to a few local, Texas Democrats. He has given significantly to National Republicans.