Cruiser is definitely the feet forward and arms out kind of bike. The cali line has been like that along with the lower seat and "teardrop" looking gas tank. Funny that a lot of cali owners get seats that are higher rather than lower (like HD riders seem to do).
If you buy a new one arrange to make a weekend of it. Pick up the bike on Thu or Fri. Ride it all weekend and take it back in on Mon if there is anything that needs adjusting. If you get it from a good dealer you won't need anything except the 500./1000mi checkup. If I were to buy a new one I'd go to Moto International in Seattle or Harper's in Texas. If you're on the east coast then Rose Farm in IL. Those are three off the top of my head but there are several others that are good.
Yes, Guzzi's vibrate. Especially if they are our of synch, and many are right from the factory. A lot of dealers would not take the time to set them up right so you'd get that paint mixer sensation. Also, when stopped they seem to vibrate even more because the motion is a side to side that you very definitely feel. And when you take off from a light you notice the torque and then shaft drive raising up the rear. The newer guzzis have a CARC so the shaft effect is not as noticeable.
But, my T5 is just as smooth when up to speed as the NT is. Buzz in the bars occurs at about the same RPM (>5000), but, it is geared lower so it is not as noticeable at freeway speeds (and my T5 is almost 30 years old!!).
If you are willing to work on your own bike Guzzi's are great to own. Parts for most are easy to get and can be had overnight in many cases. Everything is easy to get to except the clutch and even that is a one weekend job. The only big jobs my bike has needed was new fork dampers (one day job), new rear seals (couple of weekends). Simple regular maintenance like valve adjustments (30min job), oil change (30 min), brake pads (10 min each) are really nice. Wheels come off in 10 min (yes even the back one).
Warranty work can be an issue, which is why when I wanted a new bike I got a Honda.
If you are interested visit the Wild Goose forum and lurk or ask around. Great bunch of folks. If you want more detailed technical advice then GuzziTech forum. You can get really expert advice in a matter of hours (expert as in many years of Moto Guzzi maintenance and factory training, including several of the dealers). That was one reason I got a Guzzi was because of the instant help available from people who really do know what they are doing.
Look at the Cruiser section Here... Wait a minute!!! They show it on their "Touring" section as well... 
And the "Cruiser" 1300cc Custom Line bike is cross listed as a "Touring" model with the name Interstate just by adding a windshield and bags...imagine that! Not only is Honda copying Harley looks again, :rolleyes1: now they are copying their marketing style and making new "alphabet soup letter" models of the same bike with less features and calling it a different class!....
