My first wheel was/is a Monster V2, and it is my current wheel. I rode up and down the hallway for 15 minutes twice a day for 4 days, and then just started riding. I do easy cruising on back country roads and some mowed pastures. The V2 is the perfect wheel for me, and I found it very easy to learn on. If I were to get another wheel, it would be a Monster pro. I don't want or need suspension, and the bigger wheels are a joy to cruise on. This is just me, so you do you!
Enjoy the ride!