I love old bikes. Old bikes are cool. They make great second bikes. They can also give you endless problems and become money pits. They tend not to stop as well or handle as well. They do have alot of class though. The trouble with jap bikes is five minutes later you feel like another one.
If this is going to be your everyday bike then I would get the America. It has class too and is reliable. It handles well and is a reputable brand that oozes cool. It does not smell of rice. It has a soul. You may never need another bike. You have this site here where you have a wealth of technical information (if you can work out the search function) and endless comradery. You can customise, accessorize and fantasize. They sound awesome with a set of pipes. Best bike I have ever owned is my Speedmaster and I have had quite a few, just look at members ride section under stevieB 2006 speedmaster. If you can take one for a test ride to see if it fits. That should make up your mind.