Test ride, as diamond suggested. The test ride will answer most of your questions, especially if the vibration is noticeable, bearable, or unbearable for you. Personally, I like it. It's very subtle and to me, it's a way for the bike to communicate with me without having to look at the gauges. But without test riding you would never know, because everybody has their own taste and opinion. To me, the vibration means "shift up, fool!"
The test ride will also answer if the huge floorboards are big enough for you, and at 5'11" I can almost guarantee they won't be too small for the extra 2" in height you have over me. I cannot stretch my feet long enough to get 'em to the front edge of the boards. Also, the foot controls are adjustable, so when you test ride, make sure they are moved up forward enough to your liking.
Wind buffeting is eliminated with a taller windshield but even more important (from what others have reported) are the lower wind deflectors.
Agreed with diamond's post above. I would only add that oil changes for the 2011 models are every 5,000 miles, and an oil change kit costs $55.99 + tax at my local dealer (that should give you a good enough idea).
I have found a great dealer who has earned my respect and business. With Victory being the top brand for customer satisfaction for 2009 and 2010, I don't see where else you could go for better service and support. That being said, be cautious, as the dealers are ran by human beings. And if you haven't heard, human beings are tough to deal with sometimes.