G'day and welcome y'all.
Anything manufactured after 2008 should be fine as far as manufacture goes. Maintenance and the way it was ridden is, of course, another matter.
I have around 130k miles on mine, with all 48 states and a bunch of Canada as well. My longest day ride was Birmingham AL to Santa Fe, NM, but have had a number of 1,000 mile days without problems.
There are a few variations of the Rocket. Standard has pegs forward. Classic has floorboards and two-tone paint. Touring has one headlight and floorboards. Roadster has two exhaust pipes and two headlights, and footpegs further back.
Have fun on your search.