The Kensington SlimBlade could very well be called the Ferrari of the trackballs. Expensive, it looks utterly amazing and is full of cutting edge technology. I use it as my daily driver, and I love it, but it takes a daredevil to actually buy this as your first trackball.
With its fantastic scroll ring and low price, the Kensington Orbit Trackball has completely won me over as the Best Value trackball mouse currently available. Trackballing your way around the computer screen was never this smooth.
The Kensington Orbit Optical is another beginner’s trackball. Similar to the Logitech Marble (ambidextrous design, low price) but also different. Personally, I would go for the Logitech Marble, but if you’re looking for an affordable, simple, comfortable trackball to do basic computing (browsing internet, email, writing Word documents, etcetera) this could be your first trackball mouse.