Some good advice above. My add-ons and reinforcements:
- A good blade, preferably carbide-tipped
- A good brand such as DeWalt, Makita, Bosch, Milwaukee. I have a Porter-Cable, but they've been bounced around enough they now aim lower. Black and Decker, Craftsman, Ryobi and the Skil sidewinders are all for the very occasional user. A cynical view would be they sell to people who don't know better. Hitachi and Ridgid generally tend to be somewhere in the middle, though it depends on the item, sometimes, they are good offerings. Not sure where "Rockwell" is. It was an old brand name (pre-1970s) that has been rebranded.
- DeWalt, Triton, and Festool all make track saws. All very nice, but in the price range of a mid-quality table saw. It would be hard to me to justify the cost of these, since the majority of my work I do on a table saw, miter saw, or band saw (all of which I already have). These are undoubtedly fine tools, whether or not they are that much better to command two to three times the price (especially for someone that doesn't make money using them), is another question.
- Decide on a worm-drive or side-winder. When I last shopped, I picked up a worm drive and felt a muscle in my back pull. I decided I didn't want to use one much after that. They are very popular on the west coast USA for some reason. They are powerful, but heavy. Though my side-winder has the blade on the left, which I chose so that I could see the cut without having to peer over.